SOLUTION: i have tried a lot of ways to solve this equation and i just cant understand it... showing all work or step by step either using the quadratic formula or completeing the square..

Algebra ->  Functions -> SOLUTION: i have tried a lot of ways to solve this equation and i just cant understand it... showing all work or step by step either using the quadratic formula or completeing the square..      Log On


   

Question 602220: i have tried a lot of ways to solve this equation and i just cant understand it...
showing all work or step by step either using the quadratic formula or completeing the square... can u help me solve
2(3x+4)-4x(3x+4)=0 i think i have correctly simplified it into -12x^2-10x+8=0 is this correct and what do i do from here if it is..? thankyou for your help...
brandon email is- stonewoodfarms87@aol.com
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
2(3x+4)-4x(3x+4)=0
-12x^2-10x+8=0
/-2
6x^2+5x-4=0
Find the roots of the equation by quadratic formula

a= 6 , b= 5 , c= -4

b^2-4ac= 25 + 96
b^2-4ac= 121
%09sqrt%28%09121%09%29=%0911%09
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=( -5 + 11 )/ 12
x1= 0.50
x2=%28-b-sqrt%28b%5E2-4ac%29%29%2F%282a%29
x2=( -5 -11 ) / 12
x2= -1.33

0.5 & -1.33 are the roots of the equation
m.ananth@hotmail.ca