Solve by the equatic formula. 4x^2+x-1=0
4x^2 + x - 1. Use Quadratic formula.
X = (-B +-Sqrt(B^2-4AC))/2A
X = (-1 +-Sqrt(1+16))/8
X = (-1 +-Sqrt(17))/8
X = (-1 +- 4.12)/8 = 0.39, and -0.64
X = (-B +-Sqrt(B^2-4AC))/2A
X = (-1 +-Sqrt(1+16))/8
X = (-1 +-Sqrt(17))/8
X = (-1 +- 4.12)/8 = 0.39, and -0.64