Question

Expand: (2 1/2 X 2=5)
a. (a+b)^2
b. (a-b) ^2​

Answer 1

Answer:

$a. \: \: (a + b) {}^{2} = {a}^{2} + b {}^{2} + 2ab \\ b. \: \: (a - b) {}^{2} = {a}^{2} + b {}^{2} - 2ab$

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