Question

expand using suitable identity

a) (2x + y)2​

Answer 1

Answer:

(2x+y)²

by using the identity:(a+b)²=a²+b²+2ab

=(2x)²+(y)²+2(2x)(y)

=4x²+y²+4xy

Answer 2

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Formula = (a+b)²

= a²+2ab+b²

$(2x + y) {}^{2} \\ 2x {}^{2} + (2 \times 2x \times y) + y {}^{2} \\ 4x {}^{2} + 4xy + y {}^{2}$

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