Question

How do you simplify `(2x) /( x + 4) times (x-4) /( x +1 )`?

Answer 1

`(2x(x-4))/((x+4)(x+1))`

Explanation:

Multiply out.
`(2x)/(x+4)` . `(x-4)/(x+1)` `=>` `(2x^2 - 8x)/((x+4)(x+1))`

Factor numerator: `(2x(x-4))/((x+4)(x+1))`