SOLUTION: i factored this quadratic expression completely, and came up with the answer and roots of the expression. My answer is 6(x^2 + 5), root of 20. The problem is 6x2 - 42x + 72. Please

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: i factored this quadratic expression completely, and came up with the answer and roots of the expression. My answer is 6(x^2 + 5), root of 20. The problem is 6x2 - 42x + 72. Please      Log On


   

Question 144731: i factored this quadratic expression completely, and came up with the answer and roots of the expression. My answer is 6(x^2 + 5), root of 20. The problem is 6x2 - 42x + 72. Please tell me this is correct?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

6x%5E2-42x%2B72=0 Start with the given equation

6%28x-4%29%28x-3%29=0 Factor the left side


Now set each factor equal to zero:
x-4=0 or x-3=0

x=4 or x=3 Now solve for x in each case


So our answers are

x=4 or x=3