Question

a. $(2x^{3}-5x^{2}+x)+(2x^{2}+x^{3}-1)$

Explanation:

Step1: Remove parentheses

$2x^3 - 5x^2 + x + 2x^2 + x^3 - 1$

Step2: Combine like $x^3$ terms

$2x^3 + x^3 = 3x^3$

Step3: Combine like $x^2$ terms

$-5x^2 + 2x^2 = -3x^2$

Step4: Write simplified expression

$3x^3 - 3x^2 + x - 1$

Answer:

$3x^3 - 3x^2 + x - 1$