Ответы и объяснения

2012-04-08T14:59:45+04:00

(10-х)(х-1)=

10x-10-x^2+x=

-x^2+11x-10

  -x^2+11x-10=0 

 -x2 + 11x - 10 = 0
D = b2 - 4ac
D = 121 - 40 = 81 = 9^2

x1,2 = -b ± √D/2a
x1 = -11 + 9/-2 = 2/2 = 1
x2 = -11 - 9/-2 = 20/2 = 10
Ответ: x1 = 1; x2 = 10