Question

tìm x,biết

\(\left(b\right)\frac{-2}{x}=\frac{-x}{\frac{8}{25}}\)

giải chi tiết nhé mk tick cho

Answer 1

\(\frac{-2}{x}=\frac{-x}{\frac{8}{25}}\)

=>\(\left(-x\right)x=\left(-2\right).\frac{8}{25}\)

=>\(-x^2=-\frac{16}{25}\)

=>\(x^2=\frac{16}{25}\)

=>\(x=-\frac{4}{5}\) hoặc \(x=\frac{4}{5}\)

Answer 2

\(-\frac{2}{x}=-\frac{x}{\frac{8}{25}}\Rightarrow-2.-\frac{8}{25}=x^2\Rightarrow\frac{16}{25}=x^2\Rightarrow x=\frac{\sqrt{16}}{\sqrt{25}}=\frac{4}{5}\)

Answer 3

hoặc \(-\frac{4}{5}\)