А) (3х)^2 + 2 * 3х * 4 + 4^2 + 3*х + 3 * (- 2) = 46;9х^2 + 24х + 16 + 3х - 6 = 46;9х^2 + (24х + 3х) + (16 - 6) = 46;9х^2 + 27х + 10 - 46 = 0;9х^2 + 27х - 36 = 0 - поделить каждое слагаемое на 9.х^2 + 3х - 4 = 0;D = b^2 - 4ac = 3^2 - 4 * (- 4) = 9 + 16 = 25 = 5^2;x1 = (- b - √D)/2a = - 3 - 5/2 * 1 = - 8/2 = - 4;x2 = (- b + √D/2a = - 3 + 5/2 * 1 = 2/2 = 1.Ответ: х1 = - 4, х2 = 1.Б) 2 * 1 + 2 * (- 1,5х) + 2(х^2 - 2 * х * 2 + 2^2 = 1;2 - 3х + 2(х^2 - 4х + 4) = 1;2 - 3х + 2х^2 - 8х + 8 - 1 = 0;2х^2 + (- 3х - 8х) + (2 + 8 - 1) = 0;2х^2 - 11х + 9 = 0;D = b^2 - 4ac = (- 11)^2 - 4 * 2 * 9 = 121 - 72 = 49 = 7^2;x1 = (- b - √D)/2a = 11 - 7/2 * 2 = 4/4 = 1;x2 = (- b + √D)/2a = 11 + 7/2 * 2 = 18/4 = 4,5.Ответ: х1 = 1, х2 = 4,5.