SOLUTION: how do you figure out 3=x^2-4x

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Question 331470: how do you figure out
3=x^2-4x
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
x^2-4x-3=0
use the quadratic formula to get the roots of the equation
a=1,b=-4,c=-3
..
x1=-(-4)+sqrt((-4)^2-4*1*(-3)))/2*1
x1=4+sqrt(16+12)/2
x1=4+sqrt28 /2
x1=(4+2sqrt7)/2
x1=2+sqrt7
x2=2-sqrt7