Question

(3x³ + 3x² – 4x + 5) + (x³ – 2x² + x – 4)​

Answer 1

$\sf{\left(3x^3+3x^2-4x+5\right)+\left(x^3-2x^2+x-4\right)}$

$\sf{=3x^3+3x^2-4x+5+x^3-2x^2+x-4}$

$\sf{=3x^3+x^3+3x^2-2x^2-4x+x+5-4}$

$\sf{=3x^3+x^3+x^2-4x+x+5-4}$

$\sf{=4x^3+x^2-4x+x+5-4}$

$\sf{=4x^3+x^2-3x+5-4}$

$\sf{=4x^3+x^2-3x+1}$