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arlik [135]
3 years ago
7

A rectangle has a height of x+ 9 and a width of x^2 + 2x

Mathematics
2 answers:
Neporo4naja [7]3 years ago
8 0

Answer:

x³ + 11x² + 18x

Step-by-step explanation:

(x² + 2x)(x + 9)

<em>Step 1: Distribute x²+2x into x + 9.</em>

x³ + 2x² + 9x² + 18x

<em>Step 2: Combine like terms.</em>

x³ + 11x² + 18x

The area of this rectangle is x³ + 11x² + 18x.

stich3 [128]3 years ago
3 0

Answer:

Area= height x width = (x + 9) (x^2 + 2x) = x^3 + 2x^2 + 9x^2 + 18x = x^3 + 11 x^2 + 18x

Step-by-step explanation:

The height is (x + 9) and the width is (x^2 + 2x) and the the area of the rectangle is equal to: Area= height x width = (x + 9) (x^2 + 2x) = x^3 + 2x^2 + 9x^2 + 18x = x^3 + 11 x^2 + 18x

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