If $a = 2, b = - 2$ find the value of $2 a^{2} b + 2 a b^{2} + a b$ .

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Solution

It is given that,
$a = 2$
$b = - 2$
Lets evaluate $2 a^{2} b + 2 a b^{2} + a b$
$= 2 {(2)}^{2} (- 2) + 2 (2) {(- 2)}^{2} + (2) (- 2)$
$= - 16 + 16 - 4$
$= - 4$

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