Question

giải phương trình

2x + x + 12 =0

Answer 1

2x+x+12=0

=> 3x+12=0

=> 3x=-12

=>x=-4

Answer 2

3x + 12 = 0

<=> 3x = -12

<=>x   =-12 : 3 =-4

Answer 3

2x+x+12=0

=>3x+12=0

=>3x=-12

=>x=-12:3

=>x=-4

ko biết đúng ko

Answer 4

2x + x + 12 = 0

2x + x = 0 - 12

2x + x = - 12

3x = - 12

  x = - 12 : 3

  x = - 4

Answer 5

\(2x+x+12=0\)

\(x\in\left(-\infty;\infty\right)\)

\(2x+x+12=3\left(x+4\right)\)

\(3\left(x+4\right)=0\)

\(3x+12=0\)

3x = 3.( x - 4 )

\(x=-4\)

Answer 6

2x+x+12=0

3x+12=0

3(x+4)=0

x+4=0

x=-4