Question

Find the error of the expression and correct it : (2x + y) (2x + y) = 4x2

+ y

2​

Answer 1

ONE WILL BE + AD ONE WILL BE -

Answer 2

Step-by-step explanation:

$(2x + y)(2x - y)(4 \times 2 + y2)$

$= (4 \times 2 - y2)(4 \times 2 + y2)$

$= 16 \times 4 - y4$

This answer has been solved using identity

a^2-b^2

=(a+b)(a-b)