Question

simplify 2x²(x+2) -3x(x²-3)-5x(x+5) and find the result when x= -1​

Answer 1

Step-by-step explanation:

2x^2(x+2)-3x(x^2-3)-5x(x+5)

=2x^3+4x^2-3x^3+9x-5x^2-25x

= -x^3-x^2-16x

x= -1

-x^3-x^2-16x

= -(-1)^3-(-1)^2-16×(-1)

= 1-1+16

=16