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19 January, 06:25

What are the zeros of the function y = x2 + 10x - 171, and why?

A) The zeros are x = - 19 and x = 9 because in factored form, the function is y = (x - 19) (x + 9).

B) The zeros are x = - 19 and x = 9 because in factored form, the function is y = (x + 19) (x - 9).

C) The zeros are x = 19 and x = - 9 because in factored form, the function is y = (x - 19) (x + 9).

D) The zeros are x = 19 and x = - 9 because in factored form, the function is y = (x + 19) (x - 9).

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Answers (2)
  1. 19 January, 06:38
    0
    Hello,

    Answer B

    y=x²+10x-171=x²-9x+19x-171=x (x-9) + 19 (x-9) = (x-9) (x+19)
  2. 19 January, 06:41
    0
    Y = x^2 + 10x - 171

    y = (x - 9) (x + 19)

    x - 9 = 0 x + 19 = 0

    x = 9 x = - 19

    Answer B covers all requirements ... the factored form is

    y = (x + 19) (x - 9)

    and the zeros are - 19 and 9
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