Question

add x^3 - x^2-x - 1, 5x^2 +2x - 5 and 3x^3 +2x^2 +7​

Answer 1

Step-by-step explanation:

(x^3 - x^2-x - 1) + (5x^2 +2x - 5) + (3x^3 +2x^2 +7)

x³+3x³-x²+5x²+2x²-x+2x-1-5+7

4x³+6x²+x+1