Question

Find the value of the expression when a
-2 a3+ 5a2+5a-2 ​

Answer 1

Answer:

a=-2

a3+ 5a2+5a-2

$= \sf{ - 2}^{3} + 5 \times { - 2}^{2} + \frac{5}{ { - 2}^{2} } \\ = \sf \: - 8 + 5 \times 4 + \frac{5}{4} \\ = \sf - 8 + 20 + \frac{5}{4} \\ = \sf12 + \frac{5}{4} \\ \sf = \frac{48 + 5}{4} \\ \sf = \frac{53}{5}$