Question

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Answer 1

Решить уравнение:

$left(x-4right)^2+left(x+9right)^2=2x^2\2x^2+10x+97-97=2x^2-97\2x^2+10x=2x^2-97\2x^2+10x-2x^2=2x^2-97-2x^2\10x=-97\frac{10x}{10}=frac{-97}{10}\x=-frac{97}{10}=-9frac{7}{10}=-9,7$