Câu hỏi của nguyen van dat

Question

x mu 2 - 3x + 2 = 6

Tim cac so tu nhien x,y biet

Khong Biet · Accepted Answer

$x^2-3x+2=6\Rightarrow x^2-2x-x+2=6\Rightarrow x\left(x-2\right)-\left(x-2\right)=6$

$\Rightarrow\left(x-1\right)\left(x-2\right)=6$ Vì x-1>x-2 nên ta có bảng:

Vậy x$\in\left\{-1,1\right\}$

Câu trả lời:

$x^2-3x+2=6\Rightarrow x^2-2x-x+2=6\Rightarrow x\left(x-2\right)-\left(x-2\right)=6$

$\Rightarrow\left(x-1\right)\left(x-2\right)=6$ Vì x-1>x-2 nên ta có bảng:

Vậy x$\in\left\{-1,1\right\}$

Namikaze Minato · Answer

2 - 3x + 2 = 6

$\Rightarrow$2 - 3x = 6 - 2

$\Rightarrow$2 - 3x = 4

$\Rightarrow$3x = 4 + 2

$\Rightarrow$3x = 6

$\Rightarrow$x = 6 : 3

$\Rightarrow$x = 2

vậy x = 2