Question

no.15 don't give unnecessary answers​

Answer 1

Answer:

x^3+2x^2+11

Step-by-step explanation:

(x^3 - 3x^2)+(2x^2-7x)+(8x-2)+(5-3x^3)+(2x^3-7)

=x^3-3x^2+2x^2-7x+8x-2+5-3x^3+2x^3-7

= x^3+2x^3-3x^3-3x^2+2x^2-7x+8x-2+5-7

= -x^2+x-9

(x^3+x^2+x+1)-(-x^2+x-9)

= x^3+x^2+x+2+x^2-x+9

=x^3+2x^2+11

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