Simplify (5x3 + 7x – 8) + (2x3 – 5x2 – x + 3). Choose the standard form of the answer.

Question

I need help with this question if possible please thanks! -Zola.M

Answer 1

7x^3 -5x^2 + 6x - 5

5+2 = 7 for the coefficient of the x^3 term

-5 just one x^2 term

7-1 = 6 = coefficient of the x term

-8 +3= -5 = the constant term

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

= (5+2)x^3 -5x^2 + (7-1)x + (-8+3)

= 7x^3 -5x^2 + 6x -5