Question

Help please?????????????

Answer 1

B. 2x³ + 14x²

General Formulas and Concepts:

Pre-Algebra

• Distributive Property

Algebra I

• Terms/Coefficients/Degrees
• Exponential Rule:
  `\displaystyle b^m \cdot b^n = b^(m + n)`

Geometry

• Area of a Rectangle: A = lw

Explanation:

Step 1: Define

l = 2x²

w = x + 7

Step 2: Find A

1. Substitute [AR]: A = 2x²(x + 7)
2. Distribute 2x²: A = 2x³ + 14x²