3 years ago

Please help. pleasee

Mathematics

1 answer:

Paraphin [41]3 years ago

4 0

Answer:

1st option

Step-by-step 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 × $(-7)^{5}$ × $(-7)^{-9}$

= $(-7)^{(2+5-9)}$

= $(-7)^{-2}$

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