SOLUTION: find the value of x if p+7=0,q-12=0 and x^2+px+q=0

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: find the value of x if p+7=0,q-12=0 and x^2+px+q=0      Log On


   

Question 464481: find the value of x if p+7=0,q-12=0 and x^2+px+q=0
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Right away we get p = -7, q = 12 (simply solving for p and q given the two equations), so all we need to do is solve

x^2 - 7x + 12 = 0

This factors to (x-3)(x-4)= 0 so by the zero-property rule, x = 3 or 4.