x²600x203125=0
3125(1-x)²=2000x等于多少??？
3125(1-x)²=2000x 25(1-x)²=16x 25x^2-50x+25=16x 25x^2-66x+25=0 x=[66±√(66×66-4×25×25)]/(2×25) =[66±43.08]/(50)x1=2.182 x2=0.4584
解（x-1）#178;=0.64 x-1=正负8 x=9 x=-7 望采纳🦨🎫|🎃，
3125(1-x)²=2000x 25(1-x)²=16x 25x^2-50x+25=16x 25x^2-66x+25=0 x=[66±√(66×66-4×25×25)]/(2×25) =[66±43.08]/(50)x1=2.182 x2=0.4584
解（x-1）#178;=0.64 x-1=正负8 x=9 x=-7 望采纳🦨🎫|🎃，
