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Question

Solve: x2+(20x)2=218.

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Solution

x2+(20x)2=218.
x2+400+x240x=218.
2x240x+182=0
x220x+91=0.
(x13)(x7)=0
x=13,7

1117417_1278657_ans_2a3ea203fe62460d963e47d2020b7800.JPG

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