SOLUTION: B is the midpoint of line AC. Find the value of x and the length of line AB. AB= 3x^2-12 BC= 3x

Algebra ->  Length-and-distance -> SOLUTION: B is the midpoint of line AC. Find the value of x and the length of line AB. AB= 3x^2-12 BC= 3x      Log On


   

Question 647111: B is the midpoint of line AC. Find the value of x and the length of line AB.
AB= 3x^2-12
BC= 3x
Answer by opeodu(24) About Me  (Show Source):
You can put this solution on YOUR website!
AB=BC 3x^2-12=3x x^2-4-3x=0 x^2-3x-4=0 x^2-4x+x-4=0 x[x-4]+1[x-4]=0 x+1=0 or x-4=0 x=-1 or 4