azurelaxinjiang1995 azurelaxinjiang1995

20-12-2018
Mathematics

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7. Multiply the binomials: (x - 9)(x + 2)
a. x^2 - 7x - 18
b. x^2 - 11x - 18
c. x^2 - 7x + 18
d. x^2 + 7x - 18

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kaeylees kaeylees

20-12-2018

Answer:

the answer is a. x^2-7x-18

first you distribute the x in the first equation getting you x^2 +2x, then you distributed the -9 getting -9x-18. you then put those together, x^2+2x-9x-18. Finally you simplify to x^2-7x-18

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