PLEASE HELP QUICKLY!!! x^2 + (x+9)^2 = 45^2

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PLEASE HELP QUICKLY!!!

x^2 + (x+9)^2 = 45^2

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Amity 5 years 2021-07-18T10:01:46+00:00 1 Answers 20 views 0

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  1. Dau
    0
    2021-07-18T10:03:02+00:00
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    Step-by-step explanation:

    x^2+(x+9)^2=90

    x^2+(x+9)^2-90=0

    x^2+x^2+9^2+2*x*9-90=0

    x^2+x^2+81+18x-90=0

    2x^2+18x-9=0

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