Solve x^2+2x-8=0

Asked by Last Modified  

90 Answers

Follow 8
Answer

Please enter your answer

Sujoy Das

JU-IITKGP & 10+ years experienced for boards, JEE,NEET,OLYMPIAD & 5-12

x=2 or -4
1 Comments
Dislike Bookmark

BE(Electronics)

x^2+2x-8=0 then factorization splitting middle term we get x^2+4x-2x-8=0 Taking common we get x(x+4)-2(x+4)=0 after that we get (x-2) (x+4)=0 Hence we get x=2 or x= -4
Comments
Dislike Bookmark

Founder, Accelerated Learning | 15+ Teaching Years

This is an equation of form ax^2 + bx + c Use the formula for calculating the roots as- x = (-b + (b - 4ac)^1/2 ) / 2a & x = (-b - (b - 4ac)^1/2 ) / 2a Substituting values into the variables you will get- x = (-2 + (2 - 4 x (1) x (-8)) ^1/2 ) / (2 x (1)) & x = (-2 - (2 - 4 x (1) x (-8)) ^1/2...
read more
This is an equation of form ax^2 + bx + c Use the formula for calculating the roots as- x = (-b + (b - 4ac)^1/2 ) / 2a & x = (-b - (b - 4ac)^1/2 ) / 2a Substituting values into the variables you will get- x = (-2 + (2 - 4 x (1) x (-8)) ^1/2 ) / (2 x (1)) & x = (-2 - (2 - 4 x (1) x (-8)) ^1/2 ) / (2 x (1)) On solving the above you will get the roots of the equation as- x = 2 & x = -4 This is the solution for the given quadratic equation. Hope you find this useful. read less
Comments
Dislike Bookmark

Home Tutor

2 because only positive values will be selected
Comments
Dislike Bookmark

Professional Tutor with 15 years of experience.

x(x+4)-2(x+4)=0 (x-2)(x+4)=0 x=2 or -4
Comments
Dislike Bookmark

Deep Classes Nerul West Branch

x = -4 and x=2
Comments
Dislike Bookmark

SME in Mathematics & Statistics

x^2 + 2x - 8=0 x^2 + 4x - 2x - 8=0 x(x + 4) - 2(x + 4) = 0 (x + 4)(x - 2) = 0 x = - 4 or 2
Comments
Dislike Bookmark

Tutor

Ms Zeba : The factors given are perfectly alright but the solution is incomplete. The factors (x+4)(x-2)=0,means x=-4 & x=2 give complete solution of given equation.
Comments
Dislike Bookmark

BE, R V College Of Engineering, Bangalore.

x^2+4x-2x-8=0 =>x(x+4)-2(x+4)=0; =>(x+4)(x-2)=0 x=-4,x=2
Comments
Dislike Bookmark

Teacher by Choice, not by profession

x^2+4x-2x-8=0 => x(x+4)-2(x+4)=0 => (x-2)(x+4)=0 => x= 2, -4
Comments
Dislike Bookmark

View 88 more Answers

Related Questions

What are Newton's laws?
Newton's First Law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. It may be seen as a statement about inertia, that objects will...
Meenakshi S.
Mention any two inland waterways of India. Write three characteristics of each.
Two inland waterways of India are: (i) The Brahmaputra river between Sadiya and Dhubri. (ii) The West-Coast canal in Kerala. Characteristics of Brahmaputra river between Sadiya and Dhubri are as follows: (i)...
Hari
0 0
7
What produces more severe burns, boiling water or steam?
Steam will produce more severe burns than boiling water because steam has more heat energy than water due to its latent heat of vaporisation.
Mukul
0 0
7
How to decide which object will float or not in water?
it depends on the density of object
Ravi Ranjan
Define weightlessness ?
Thing which has zero gravity.
Kumar Upendra Akshay

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Best practice to study
for study effectively presence of mind is crucial.there is no point in studying 5 hours if you do not remember anything from that.its is better if you study for 10 minutes and remember everything from...
K

Kapil Bharadwaj

0 0
0
The structure of silicon dioxide, SiO2
There are three different crystal forms of silicon dioxide. The easiest one to remember and draw is based on the diamond structure. Crystalline silicon has the same structure as diamond....

Debraj Paul

1 0
0
Solution to a trigonometric problem.
If 4 cos θ - 3 sin θ = 0 find the value of ( cos² θ • sin² θ ) / (1 + tan θ ) 4 cos θ = 3 sin θ or sin θ / cos θ = 4 / 3 or. tan...

B.sudhakar

3 0
0
Average Speed
Average speed is total distance travelled in total time. We can calculate average only when we are given any of these two. In case, we are given only speed, then this formula is helpful. V travelled...

Vijaya Kumar Jayanthi

1 0
0
learning is possible for every one
for easy learning, we can do one thing that, read the portion ,which u wants to learn, and close the book then think about the topic with out the help of your text..
A

Aswathy Prakash

0 0
0

Recommended Articles

Quest Academy - Institute of the month

Quest Academy is a professional Bangalore based NEET and JEE (Main + Advanced) training institute. The academy was incorporated in 2015 to cater to the needs of students, who aim to crack competitive exams by connecting with the best brains around. The institute helps students enhance their skills and capabilities through...

Read full article >

Meet Sandhya R, a B.Sc tutor from Bangalore

Sandhya is a proactive educationalist. She conducts classes for CBSE, PUC, ICSE, I.B. and IGCSE. Having a 6-year experience in teaching, she connects with her students and provides tutoring as per their understanding. She mentors her students personally and strives them to achieve their goals with ease. Being an enthusiastic...

Read full article >

Meet Swati, a Hindi Tutor from Bangalore

Swati is a renowned Hindi tutor with 7 years of experience in teaching. She conducts classes for various students ranging from class 6- class 12 and also BA students. Having pursued her education at Madras University where she did her Masters in Hindi, Swati knows her way around students. She believes that each student...

Read full article >

Meet Raghunandan.G.H, a B. Tech Tutor from...

Raghunandan is a passionate teacher with a decade of teaching experience. Being a skilled trainer with extensive knowledge, he provides high-quality BTech, Class 10 and Class 12 tuition classes. His methods of teaching with real-time examples makes difficult topics simple to understand. He explains every concept in-detail...

Read full article >

Find Class 10 Tuition near you
Class 10 Tuition in Delhi
Class 10 Tuition in Bangalore
Class 10 Tuition in Hyderabad
Class 10 Tuition in Kolkata
Class 10 Tuition in Chennai
Class 10 Tuition in Mumbai
Class 10 Tuition in Pune
Class 10 Tuition in Noida
Class 10 Tuition in Lucknow
Class 10 Tuition in Gurgaon
Online Tuition Class 10

Looking for Class 10 Tuition ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you