Question

Find the product of (2x + 5y)2.

4x2 + 20xy + 25y2

4x2 − 20xy + 25y2

4x2 − 25y2

4x2 + 25y2

Answer 1

4x2 + 20xy + 25y2

Explanation:

Answer 2

correct answer is option A

Explanation:

given,

(2 x + 5 y)².................(1)

using identity of

( a + b )² = a² + b² + 2 a b

using identity in equation (1)

(2 x + 5 y)² = (2 x)² + (5 y)² + 2 × (2 x) ×(5 y)

(2 x + 5 y)² = 4 x² + 25 y² + 20 x y

hence on solving the equation by using identity we get

(2 x + 5 y)² = 4 x² + 25 y² + 20 x y

so, the correct answer is option A