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11 January, 20:01

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

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  1. 11 January, 20:18
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    To find the zeros, you have to factor the equation.

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

    This is because 19*-9=-171 and 19-9=10.

    Now to make x=0, you have to make the equation

    x+19=0

    and x-9=0

    To solve, isolate x on both equations.

    This makes x=-19 and x=9.
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