Question

a minus b whole square + 4 a b​

Answer 1

(a - b)^2 + 4ab

=> a^2 + b^2 - 2ab + 4ab

=> a^2 + b^2 + 2ab

=> (a + b)^2

Thus, (a - b)^2 + 4ab = (a + b)^2

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