Correct option is D
Given:
(2x − 5y)2+ (5x + 2y)2+ (2x + 5y)(2x − 5y)
Formula Used:
Solution:
(2x − 5y)2+ (5x + 2y)2+ (2x + 5y)(2x − 5y)
= 4x2 + 25y2 − 10xy + 25x2 + 4y2 + 10xy + 4x2 - 25y2
= 33x2 + 4y2
Simplify (2x − 5y)2 + (5x + 2y)2 + (2x + 5y)(2x − 5y).
Given:
(2x − 5y)2+ (5x + 2y)2+ (2x + 5y)(2x − 5y)
Formula Used:
Solution:
(2x − 5y)2+ (5x + 2y)2+ (2x + 5y)(2x − 5y)
= 4x2 + 25y2 − 10xy + 25x2 + 4y2 + 10xy + 4x2 - 25y2
= 33x2 + 4y2
A boy was asked to multiply a certain number by 25. He, by mistake, multiplied the number by 52 and got the product which was greater than the correct product by 324. The number to be multiplied was:
If [p] denotes the greatest integer less than or equal to p, then is equal to: