Question

Simplify the expression: y9 * y-2

Answer 1

`y^7`

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!