Question

If a = 2 , b = -2 then the value of a+2 + ab - b2 is
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Answer 1

Explanation:

$a = 2 \\ b = - 2 \\ {a}^{2} + ab + {b}^{2} = {2}^{2} + (2)( - 2) + { ( - 2)}^{2} \\ = 4 - 4 + 4 \\ = 4$

Ur answer : 4