Question

what is the value of the expression 4x(3-x)+5x(x-2) for x=(-3)​

Answer 1

Answer:-

4x(3-x)+5x(x-2) where x=-3.

12x-4x^2+5x^2-10x.

substituting x=-3 we get.

12(-3)-4(-3)^2+5(-3)^2-10(-3).

-36-4(+9)+5(+9)-30.

-36+36+45-30.

+45-30.

+15.

Answer:- 15.