Question

Simplify 7^-9 x 7^-7x 7^-9 leaving your answer in the form a^n where a is a whole number

Answer 1

`{7}^( - 9) * {7}^( - 7) * {7}^( - 9) \\ = {7}^( (- 9) + ( - 7) + ( - 9)) \\ = {7}^( - 9 - 7 - 9) \\ = {7}^( - 25)`