Question

Tìm x, biết

g) (x  -3)²  - x(x-2)= -5

Answer 1

\(\left(x-3\right)^2-x\left(x-2\right)=-5\)

\(\Leftrightarrow x^2-6x+9-x^2+2x=-5\)

\(\Leftrightarrow9-4x=-5\)

\(\Leftrightarrow4x=-14\)

\(\Leftrightarrow x=-14:-4\)

\(\Leftrightarrow x=\frac{7}{2}\)

Answer 2

g) (x  -3)²  - x(x-2)= -5

=>x²-6x+9-x²+2x=-5

=>9-4x=-5

=>2x=7

=>x=7/2

 

 

Answer 3

\(\left(x-3\right)^2-x\left(x-2\right)=-5\)

\(x^2-9-x^2+2x=-5\)

\(-9+2x=-5\)

\(2x=4\)

\(\Rightarrow x=2\)

Answer 4

ô ô hình như sài goài