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24 April, 13:49

Write a simplified polynomial expression to represent the area of the rectangle

with a x + 5 on the right side and a 2x - 4 on the bottom.

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  1. 24 April, 14:01
    0
    The answer is A = 2x² + 6x - 20

    The area of the rectangle is:

    A = l * w

    l = x + 5

    w = 2x - 4

    A = (x + 5) (2x - 4)

    Use the distributive property to calculate this:

    A = (x + 5) (2x - 4)

    A = x * 2x + x * (-4) + 5 * 2x + 5 * (-4)

    A = 2x² - 4x + 10x - 20

    A = 2x² + 6x - 20
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