Question

2(x-3)(x+1)=(2x+1)(x+3)-12

 

Answer 1

\(\Leftrightarrow2\left(x^2-2x-3\right)=2x^2+7x+3-12\)

\(\Leftrightarrow2x^2-4x-6-2x^2-7x+9=0\)=

=>3-11x=0

hay x=3/11

Answer 2

(2x² - 6)(x - 1) = (2x + 1)(x + 3) - 12

2x²- x - 6x + 6 = 2x²+ 6x + x + 3 - 12

2x² - 2x -6x + 6 - 2x² - 6x - x - 3 + 12 = 0

-15x -15 =0

-15x = 15

x= -1