Ответы и объяснения

  • Участник Знаний
2013-07-10T17:49:54+00:00

(X-1)*(2X-1) + (X+1)*(2X+1) \ 4X^2 - 1 = 8X - 1 \ 4X^2 - 1

(X-1)*(2X-1) + (X+1)*(2X+1) = 8X-1

2X^2 - 3X + 1 + 2X^2 + 3X + 1 = 8X - 1

4X^2 + 2 = 8X - 1

4X^2 - 8X + 3 = 0

D = 64 - 4*4*3 = 64-48 = 16

V D = 4

X1 = (8 + 4) \ 8 = 12\8 = 1.5

X2 = ( 8 - 4) \ 8 = 4\8 = 0.5

ОТВЕТ: 1.5  и 0.5