Question 973626

2x^2+4x-8=0 
x= (1/4) -4 +/- sqrt (16+64) ;;;   sqrt (80) = 4 sqrt 5

x= -1 +/- sqrt 5
This is +1.236 and -3.236


{{{graph(300,300,-10,10,-10,10,2x^2+4x-8)}}}