Find the product: (x – 3y) (x + 3y) (x2 + 9y2)

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The product of the first two terms is x^2 - 9y^2. The third term is x^2 + 9y^2 So the final product is x^4 - 81y^4
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Mathematician

x^4-9y^4
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Mathematician

x^4-81y^4
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Trainer

(x-3y)(x+3y)(x2+9y2) =(x2-9y2)(x2+9y2) =(x4-81y4) (ans) Thank you.
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x4-81y4
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Related Questions

The angles of a triangle are arranged in ascending order of magnitude. If the difference between two consecutive angles is 10°, find all the three angles.
Let the any one of the angle of triangle be x then other two angle are x+10, x+20 According to Question, x + (x+10) + (x+20)=180 3x + 30 = 180 3x = 150 x = 50 Thus, angles would be 50, 60, and 70.
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How many triangles can be drawn having its angles as 45°, 64° and 72°? Give reason for your answer.
Zero triangles.. we cant draw triangle with these angles. but the given angles are 45,64.72. if we add those we get 45+64+72=181. so we cannot draw triangle.
Satish

How to learn math online?

Via skype you can teach everything online
Robin

What are the important topics to cover for ICSE Maths for 9th class students. Also please share any sample blueprints for 2019-2020.

Algebra, e.g. quadratic equations, linear equation, geometry triangle, circle, straight line etc
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