Answer:
B x=3
Step-by-step explanation:
12x = 2x^2 +18
Divide by 2
12x/2 = 2x^2/2 +18/2
6x = x^2 +9
Subtract 6x from each side
6x-6x = x^2 -6x+9
0= x^2 -6x+9
Factor
What 2 numbers multiply to 9 and adds to -6
-3*-3 = 0
-3+-3 =-6
0= (x-3) (x-3)
Using the zero product property
x-3 =0 x-3 =0
x=3 x=3
