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15 May, 16:27

What is the value of z so that - 9 and 9 are both solutions of x^2+z=103?

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  1. 15 May, 16:49
    0
    Z = 22

    Step-by-step explanation:

    plug 9 into the equation

    9^2 + z = 103

    81 + z = 103

    subtract 81 from both sides

    z = 22

    do the same with - 9

    since you are squaring - 9 this still equals 81 so the answer is the same.
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