(x - 2) (x + 4)^2 = 7(x+4)
(x - 2)*(x + 4)^2 - 7(x+4) = 0
(x+ 4) ((x - 2)(x + 4) - 7) = 0
(x+ 4) (x^2 + 2x - 8 - 7) = 0
(x + 4) ( x^2 + 2x - 15) = 0
x + 4 = 0
x1 = - 4
x^2 + 2x - 15 = 0
D = 4 + 4*15 = 64
x2 = ( - 2 + 8)/2 = 6/2 = 3;
x3 = ( - 2 - 8)/2 = - 10/2 = - 5
Ответ:
- 5; - 4; 3
0,29x+58-0,89=216
-0,6x=158
x=-263,333
Ответ:Это приблизительно 4)-263
1,2х+3,7-0,7=1,3х
1,2х-1,3х=0,7-3,7
-0,1х=-3
х=30
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