text: If it equals zero, use FOIL: (y+6)(y-5) = 0\n\nso y = -6 or 5 [since -6 + 6 is zero and so is 5 - 5]\n\nIf it equals another number, subtract that from both sides to make it equal zero then use FOIL (or quadratic formula)\n\nExample: y^2 + y - 30 = 12\n\ny^2 + y - 30 - 12 = 12 - 12\n\ny^2 + y - 42 = 0\n\n(y+7)(y-6) = 0\n\ny = -7 or 6