Question

Please help. pleasee

Answer 1

1st option

Explanation:

Using the rule of exponents

`a^(m)` ×
`a^(n)` ⇔
`a^((m+n))` ( which can be used on more than 2 numbers )

Given

(- 7)² ×
`(-7)^(5)` ×
`(-7)^(-9)`

=
`(-7)^((2+5-9))`

=
`(-7)^(-2)`