Question

if a = 2 b = -2, find the value of a²- ab + b²​

Answer 1

Step-by-step explanation:

$a = 2 \\ b = - 2 \\ {a}^{2} + {b}^{2} - 2ab \\ = {(a -b)}^{2} \\ = ({2+ - 2})^{2} \\ = {0}^{2} \\ = 0$

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