Solve each equation and express your answer in simplest radical form:
5x - 7x2 = 3x + 4
5x - 7x^2 = 3x + 4 rearrange as
7x^2 - 2x + 4 = 0
Using the quadratic formula with a = 7, b = -2 and c = 4 we have that
x = - (-2) ± √[ (-2)^2 - 4*7 *4] 2 ± √[ 4 - 112] 2 ± √[-108]
______________________ = ______________ = ____________ =
2 (7) 14 14
2 ± i √[ 9 * 3 * 4 ] 2 ± 6i√3 1 ± 3i √3
______________ = _________ = _________
14 14 7