Question

Помогите!!!!
(1-7х)²+14х

Answer 1

1-14x+49x²+14x=0
1+49x²=0
49x²=-1
x²=-1/49
х=(+-)i/7

Answer 2

1-14x+49x²+14x=0
1+49x²=0
49x²=-1
x=(+/-)i/7

Answer 3

спс)

Answer 4

(1-7х)²+14х=1-14х+49х²+14х=1+49х²