Ответы и объяснения

2012-05-16T20:04:04+04:00

2x в квадрате -12x-1=2(1-2x)

2x^2-12x-1-2+4x=0

 2x2 - 8x - 3 = 0
D = b2 - 4ac
D = 64 + 24 = 88 = (2√22)^2

x1,2 = -b ± √D/2a
x1 = 8 + 2√22/4 = 4 + √22//2
x2 = 8 - 2√22/4 = 4 - √22/2
Ответ: x1 = 4 + √22/2
 ; x2 = 4 - √22/2