SOLUTION: instructions: solve the quadratic equation. 1.2x^2-3x-11=0

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: instructions: solve the quadratic equation. 1.2x^2-3x-11=0      Log On


   

Question 700763: instructions: solve the quadratic equation.
1.2x^2-3x-11=0
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
Find the roots of the equation by quadratic formula

a= 2 b= -3 c= -11

b^2-4ac= 9 - -88
b^2-4ac= 97
sqrt%28%0997%09%29= 9.85
x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29
x1=%28-b%2Bsqrt%28b%5E2-4ac%29%29%2F%282a%29
x1=( 3 + 9.85 )/ 4
x1= 3.21
x2=( 3 -9.85 ) / 4
x2= -1.71