Question

Срочно
x^2+y^2=148
x+y=10





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Answer 1

Ответ:

$x^{2} +y^{2} =148\\x+y=10\\x^{2} +y^{2} =148\\y=10-x\\x^{2} +(10-x)^{2} =148\\y=10-x\\\\\x^{2} +(100-20x-x^{2} ) =148\\\\2x^{2} -20x-48=0\\D=400+384=784=18^{2} \\x1,2=\frac{20+-18}{4} ->x1=9,5; x2=0,5\\1)x=9,5 -> y=0,5\\2)x=0,5 -> y=9,5$