Question

Bài 1 : tìm x,y:

a,(3x-\(\frac{4}{5}\))² +(2y+\(\frac{3}{7}\))²=0

b,(x+y-\(\frac{1}{4}\))²+(x-y+\(\frac{1}{5}\))²=0

Answer 1

Bài 1:

a) \(\left(3x-\frac{4}{5}\right)^2+\left(2y+\frac{3}{7}\right)^2=0\)

\(\Rightarrow\left\{\begin{matrix}3x-\frac{4}{5}=0\\2y+\frac{3}{7}=0\end{matrix}\right.\rightarrow\left\{\begin{matrix}3x=\frac{4}{5}\\2y=-\frac{3}{7}\end{matrix}\right.\rightarrow\left\{\begin{matrix}x=\frac{4}{15}\\y=-\frac{3}{14}\end{matrix}\right.\)