Question

Simplify the expression: y9 * y-2

Answer 1

Answer:

$y^7$

Step-by-step explanation:

If we want to simplify the expression $y^9 \cdot y^{-2}$, we have to note that exponent rules state that $x^a \cdot x^b = x^{a+b}$.

This means that if we add the exponents, that will be what we raise y to the power of.

$9 + -2 = 9-2 = 7$

So $y^7$.

Hope this helped!