Question

If a=-2,B=3, evaluate the following:- a) 25apower-3

Answer 1

$25 {a}^{ - 3} \\ = 25 \div {a}^{3} \\ = 25 \div {( - 2)}^{3} \\ = 25 \div ( - 8)$
= 25/8
= 3.125

Answer 2

a=-2
b=3
25a^-³ =?
=25(-2)^-3
=(-50)^-3
=(-1/50)³
=(-1/125000)
Hope it helps you....