x(x-6)2+ 2(x-3)2= 81 2x^2-12x+4x-12=81 2x^2-8x-93=0 2x2 - 8x - 93 = 0 D = b2 - 4ac D = 64 + 744 = 808 = (2√202)^2 x1,2 = -b ± √D/2a x1 = 8 + 2√202/4= 4 + √202/2 x2 = 8 - 2√202/2/4 = 4 - √202/4 Ответ: x1 = 4 + √202/2 ; x2 = 4 - √202/2