A developer wants to purchase a plot of land to build a house. The area of the plot can be described by the following expression: (5x+1)(7x−

Question

A developer wants to purchase a plot of land to build a house. The area of the plot can be described by the following expression: (5x+1)(7x−8) where x is measured in meters. Multiply the binomials to find the area of the plot in standard form

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MichaelMet 3 years 2021-08-14T20:15:43+00:00 1 Answers 9 views 0

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  1. Maris
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    2021-08-14T20:17:20+00:00
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    Answer:

    Area = 35x^2 -33x - 8

    Step-by-step explanation:

    Given

    Area = (5x + 1)(7x - 8)

    Required

    Express in standard form

    Area = (5x + 1)(7x - 8)

    Expand the brackets

    Area = 5x(7x - 8) + 1(7x - 8)

    Open brackets

    Area = 5x*7x - 5x*8 + 1*7x - 1*8

    Area = 35x^2 - 40x + 7x - 8

    Simplify like terms

    Area = 35x^2 -33x - 8

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )