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Fiesta28 [93]
3 years ago
6

Find the area of a rectangle with a width of x3 + 5x - 9 and a length of x2 + 8.

Mathematics
1 answer:
Drupady [299]3 years ago
4 0

Answer:

A = x⁵ + 13x³ - 9x² + 40x - 72  

Step-by-step explanation:

The formula for the area of a rectangle is length X width, or A = lw.

Substitute the equations for the sides into the formula:

A = lw

A = (x² + 8)(x³ + 5x - 9)      <= use the distributive property

A = x⁵ + 5x³ -9x² + 8x³ + 40x - 72   <= collect like terms

A = x⁵ + 13x³ - 9x² + 40x - 72

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