English Medium Class 9 - CBSE Question Bank Solutions for Mathematics

If x = 3 and y = − 1, find the values of the following using in identify:

 (9y² − 4x²) (81y⁴ +36x²y² + 16x⁴)

If x = 3 and y = − 1, find the values of the following using in identify:

\[\left( \frac{3}{x} - \frac{x}{3} \right) \left( \frac{x^2}{9} + \frac{9}{x^2} + 1 \right)\]

If x = 3 and y = − 1, find the values of the following using in identify:

\[\left( \frac{x}{7} + \frac{y}{3} \right) \left( \frac{x^2}{49} + \frac{y^2}{9} - \frac{xy}{21} \right)\]

If x = 3 and y = − 1, find the values of the following using in identify:

\[\left( \frac{x}{y} - \frac{y}{3} \right) \frac{x^2}{16} + \frac{xy}{12} + \frac{y^2}{9}\]

If x = 3 and y = − 1, find the values of the following using in identify:

\[\left( \frac{5}{x} + 5x \right)\] \[\left( \frac{25}{x^2} - 25 + 25 x^2 \right)\]

If x = −2 and y = 1, by using an identity find the value of the following

If x = −2 and y = 1, by using an identity find the value of the following

If x = −2 and y = 1, by using an identity find the value of the following

Find the following product:

(3x + 2y + 2z) (9x² + 4y² + 4z² − 6xy − 4yz − 6zx)

Find the following product:

(4x − 3y + 2z) (16x² + 9y² + 4z² + 12xy + 6yz − 8zx)

Find the following product:

(2ab − 3b − 2c) (4a² + 9b² +4c² + 6 ab − 6 bc + 4ca)

Find the following product:

(3x − 4y + 5z) (9x² +16y² + 25z² + 12xy −15zx + 20yz)

Evaluate:

25³ − 75³ + 50³

Evaluate:

48³ − 30³ − 18³