4x^2+8x-3=0
4(x+1)^2 -7=0
x+1 = ±√7/2
x = (-2±√7)/2
2x^2+1=3x
2(x- 3/2)^2 - 7/2 =0
x- 3/2 = ±√7/2
x = (3±√7)/2