Question

Help for question 1 and 2​

Answer 1

(1).
`5^(4)` ×
`13^(7)` ; (2). 3 - 5x

Explanation:

1). [( - 5 )³ · ( - 5 )] (
`13^(-2)` ·
`13^(9)` ) =
`(-5)^(3+1)` ×
`(13)^(-2+9)` =
`(-5)^(4)` ×
`13^(7)` =
`5^(4)` ×
`13^(7)`

2). - 25x² ÷ 5x + 15x ÷ 5x = 3 - 5x