Question

How do you multiply `(x + -3)(10x + -20)`?

Answer 1

`10x^2-50x+60`

Explanation:

`(x+ -3)(10x+ -20)`

`=` `(x-3)(10x-20)`

`=` `x*(10x-20)-3*(10x-20)`

`=` `(10x^2-20x)-30x+60`

`=` `10x^2-20x-30x+60`

`=` `10x^2-50x+60`