Question

evaluate 4a2+4a-2 when a= -3​

Answer 1

SOLUTION

TO DETERMINE

$\sf{4 {a}^{2} + 4 {a}^{ - 2} \: \: \: when \: a = - 3 }$

EVALUATION

Here the given expression is

$\sf{4 {a}^{2} + 4 {a}^{ - 2}}$

When a = - 3 we get

$\sf{4 {a}^{2} + 4 {a}^{ - 2}}$

$\sf{ = 4 {( - 3)}^{2} + 4 {( - 3)}^{ - 2}}$

$\displaystyle \sf{ = (4 \times 9) + \frac{4}{ {( - 3)}^{2} } }$

$\displaystyle \sf{ =36 + \frac{4}{9} }$

$\displaystyle \sf{ =36 \frac{4}{9} }$

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