Question

tim x, biết   x/-15=-60/x

Answer 1

\(\frac{x}{-15}=\frac{-60}{x}\)

=>x.x=(-15).(-60)

=>x²=900=30²=(-30)²

=>x=30,-30

Vậy x=30,-30

Answer 2

\(\frac{x}{-15}=\frac{-60}{x}\)

<=> (-15).(-60) = x.x

<=> 900 = x²

=> x² = 30² = (-30)²

=> x \(\in\){30; -30}

Answer 3

khong biet lam tim a biet 30 + a / 30 = 13 / 15