Question

Simplify the following expression and find its value when a=2 and b=( - 1) *

Answer 1

$\mathrm\red{Given : }$

$\mathrm{3( {a}^{2} + ab) + 4 - 2ab} \\ \\ ⇒ \mathrm{3 {a}^{2} + 3ab + 4 - 2ab } \\ \\ ⇒ \mathrm{3 {a}^{2} + ab + 4 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: }$

$\mathrm\red{If \: \: a = 2 \: \: and \: \: b = ( - 1)}$

$\mathrm{3( {2}^{2}) + 2( - 1) + 4 } \\ \\ \mathrm{ = 3(4) - 2 + 4} \\ \\ \mathrm{ = 12 - 2 + 4} \\ \\ \mathrm{ = \: 14}$

Answer 2

Answer:

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