Question

Simplify (-9)10 × (-9)-3.

Answer 1

same base product
keep the base, SUM the exponents

Answer 2

so -9^7

Answer 3

yeap \(\large \bf a^{\color{blue}{ n}}\times a^{\color{brown}{ m}}\implies a^{{\color{blue}{ n}}+{\color{brown}{ m}}}\)

Answer 4

:O yay ! thank you

Answer 5

yw