х⁴ -10х³+250х -625 = 0
(x⁴-625)-10x(x²-25)=0
(x²-25)(x²+25)-10x(x²-25)=0
(x²-25)(x²-10x+25)=0
(x²-25)(x-5)²=0
(x+5)(x-5)³=0
x+5=0 или (x-5)³=0
x=-5 x-5=0
x=5
х⁴ -10х³+250х -625 = 0
(x⁴-625)-10x(x²-25)=0
(x²-25)(x²+25)-10x(x²-25)=0
(x²-25)(x²-10x+25)=0
(x²-25)(x-5)²=0
(x+5)(x-5)³=0
x+5=0 или (x-5)³=0
x=-5 x-5=0
x=5