Question

(10x³ + 15x²) + (4x + 6)

Explanation:

Step1: Distribute first polynomial terms

$(10x^3)(4x) + (10x^3)(6) + (15x^2)(4x) + (15x^2)(6)$

Step2: Calculate each product

$40x^4 + 60x^3 + 60x^3 + 90x^2$

Step3: Combine like terms

$40x^4 + (60x^3+60x^3) + 90x^2$

Answer:

$40x^4 + 120x^3 + 90x^2$