simplify (-9)10 times (-9)4

Question

(-9)10 times (-9)4

Answer 1

When multiplying two terms which have the same base (in this case, -9), the base remains the same and you add the exponents together. 

Here is a generic example: (xⁿ)(x^m) = x^n+m

For your specific question, the base (x) is -9, the first exponent (n) is 10, and the second exponent (m) is 4.

(-9)¹⁰(-9)⁴ = (-9)¹⁰⁺⁴ = (-9)¹⁴