x^ - 2x - 13 = 0
x^ - 2x = 13
4x^ - 8x = 4x^ - 8x + 4 = 52 + 4 4x^ - 8x + 4 = 56
2x - 2 = ±√(56) (d)
2x-2 = ±√(4*14)
2x-2 = ±2√(14)
2x = 2+2√(14).. . 2x = 2-2√(14)
x = 1 + √(14).. . x = 1 -...