Question

Evaluate using suitable identity
(8x+5y)^2​

Answer 1

(8x+5y)^2

using (a+b)^2=a^2+b^2+2ab

=8x^2+5y^2+2×8x×5y

=64x^2+25y^2+80xy

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Answer 2

$(8x + 5y) {}^{2}$

Using = ( a + b )² = a² + 2ab + b²

$64x {}^{2} + 80xy + 25y {}^{2}$

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