leodragneel0789 leodragneel0789

01-07-2016
Mathematics

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Simplify: (x - 5)(7x2 - 8x - 7)

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texaschic101 texaschic101

01-07-2016

first, multiply the x through the parenthesis
x(7x^2 - 8x - 7) = 7x^3 - 8x^2 - 7x
now multiply the -5 through the parenthesis
-5(7x^2 - 8x - 7) = -35x^2 + 40x + 35
now combine like terms
7x^3 - 43x^2 + 33x + 35

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lobster lobster

01-07-2016

7x^3-43x^2-37x+385 is the answer. Multiply each term in the 1st expression by each in the 2nd expression then u combine like terms.

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