来自钱雪平的问题
(3x-1)²+1-3x=64x²-6x-4=0a²-4a-7=0x²+4x-2=0
(3x-1)²+1-3x=64x²-6x-4=0a²-4a-7=0x²+4x-2=0
1回答
2020-06-20 17:27
(3x-1)²+1-3x=64x²-6x-4=0a²-4a-7=0x²+4x-2=0
(3x-1)²+1-3x=64x²-6x-4=0a²-4a-7=0x²+4x-2=0
(3x-1)²+1-3x=6
(3x-1)²-(3x-1)-6=0
(3x-1-3)(3x-1+2)=0
x=4/3x=-1/3
4x²-6x-4=0
2x²-3x-2=0
(2x+1)(x-2)=0
x=-1/2x=2
a²-4a-7=0
a²-4a+4=11
(a-2)²=11
a=2+√11a=2-√11
x²+4x-2=0
x²+4x+4=6
(x+2)²=6
x=-2+√6x=-2-√6