true

Take Class 10 Tuition from the Best Tutors

• Affordable fees
• 1-1 or Group class
• Flexible Timings
• Verified Tutors

Search in

# Quadratic Equation Completing Square

Kiran Kumar HJ
05/04/2017 0 0
• Find the x-intercepts of y = 4x2 – 2x – 5.

First off, remember that finding the x-intercepts means setting y equal to zero and solving for the x-values, so this question is really asking you to "Solve 4x2 – 2x – 5 = 0".

 This is the original problem. 4x2 – 2x – 5 = 0 Move the loose number over to the other side. 4x2 – 2x = 5 Divide through by whatever is multiplied on the squared term. Take half of the coefficient (don't forget the sign!) of the x-term, and square it. Add this square to both sides of the equation. Convert the left-hand side to squared form, and simplify the right-hand side. (This is where you use that sign that you kept track of earlier. You plug it into the middle of the parenthetical part.) x2-(1/2)x=(5/4) (-1/4)2=(1/16) x2-(1/2)x+(1/16)=(5/4)+(1/16) (x-(1/4))2=(21/16) Square-root both sides, remembering the"±" on the right-hand side.  Simplify as necessary. x=(1/4)+0r-sqrt(21)/4 Solve for "x =". x=(1/4)+0r-sqrt(21)/4 Remember that the "±" means that you have two values for x.

The answer can also be written in rounded form as -0.89 and 1.39

0 Dislike
Follow 0

Please Enter a comment

## Other Lessons for You

Difference Between LCD and LED Televisions
LED TV’s are still LCD TV’s. They are just considered to be the newer LCD TV version because of the new backlight system used. The LED TV uses Light Emitting Diodes, while the standard LCD...

Important Of Co-ordinate Geometry
1. We require two perpendicular axes to locate a point in the plane. One of them is horizontal and other is Vertical. 2. The plane is called Cartesian plane and axis are called the coordinates axis. 3....

OAA
I suggest a writing tip called OAA which means Observe Analyse and Apply. one will find it easy to answer any question if you follow this trip

knowledge is the backbone of society’s progress.
Life-changing knowledge does typically require advanced learning techniques. In fact, it’s been said that the average adult only uses 10% of his/her brain. Imagine what we may be capable of with more advanced learning techniques.

Squaring numbers ending in 5..
Solve the square of 25, in a jiffy. Answer : 625 Another one: square of 35. Answer : 1225. How it is done ?25 x 25 . The last two digits of the product will always be 25 ( as 5 x 5 =25). The initial...

### Looking for Class 10 Tuition ?

Learn from Best Tutors on UrbanPro.

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you

X

### Looking for Class 10 Tuition Classes?

The best tutors for Class 10 Tuition Classes are on UrbanPro

• Select the best Tutor
• Book & Attend a Free Demo
• Pay and start Learning

### Take Class 10 Tuition with the Best Tutors

The best Tutors for Class 10 Tuition Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more