Question

(7x³-11x-1)-(12x³+x²-8)​

Answer 1

`- 5 {x}^(3) - {x}^(2) - 11x + 7 \\`

Explanation:

Before solving that we have to know that,

`( + ) * ( + ) = ( + ) \\ ( - ) * (- ) = ( + ) \\ ( + ) * ( - ) = (- )`

Let's solve now.

`7 {x}^(3) - 11x - 1 - (12 {x}^(3) + {x}^(2) - 8) \\ 7 {x}^(3) - 11x - 1 - 12 {x}^(3) - {x}^(2) + 8 \\ 7 {x}^(3) - 12 {x}^(3) - {x}^(2) - 11x - 1 + 8 \\ = - 5 {x}^(3) - {x}^(2) - 11x + 7`

Hope this helps you.

Let me know if you have any other questions :-):-)