Math

What is the solution of n² - 49 = 0

-7
7
±7
No Solution

What is the value of z so that -9 and 9 are both solutions of x² + z = 103
-22
3
22
184

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  1. n^2 = 49
    well, 7^2 = 49
    also (-7)^2 = (-7)(-7) = 49

    well, 9^2 = (-9)^2 = 81
    so, that means you need
    81+z = 103
    so, what do you think?

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  2. 22?

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  3. good choice.

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