Question

tìm x :    x .( x - 1/2 ) = 1 + x.x

Answer 1

\(x.\left(x-\frac{1}{2}\right)=1+x.x\)

\(x^2-\frac{1}{2}x=1+x^2\)

\(\frac{-1}{2}x=1+x^2-x^2\)

\(\frac{-1}{2}x=1\)

\(\Leftrightarrow x=1:\frac{-1}{2}=-2\)

Answer 2

x² - 1/2 x = 1 + x²

-1/2 x = 1

x = -2

Answer 3

x^2-1/2x=1+x^2

=> không có giá trị c thỏa mãn

Answer 4

x ( x - 1/2 ) = 1 + x.x

x² - 1/2x = 1 + x²

x² - x² -1/2 x = 1

-1/2x = 1

x = 1 : (-1/2)

x= -2