3 years ago

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

Mathematics

1 answer:

andreev551 [17]3 years ago

4 0

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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