Question

PLSSSS HELPPPPP 20 POINTSSSSSS MATHHH

Answer 1

`-63b^6`

Explanation:

When you multiply two exponents together with the same base, the exponents get added

Here the base is the same ie b

So
`b^4 . b^2 = b^(4+2) = b^6`

The constants multiply in the usual sense so 7(-9) = -63

Answer is
`-63b^6`