1.(7x-1)²-3=0
2.x²﹢2x=0
3.x²-8x+15=0
4.x²-2x-99=0
5.5x²+2x-1=0
6.2(x-4)²﹢16=0
就是这些了,
1.(7x-1)²-3=0
2.x²﹢2x=0
3.x²-8x+15=0
4.x²-2x-99=0
5.5x²+2x-1=0
6.2(x-4)²﹢16=0
就是这些了,
1.(7x-1)²-3=0 X=1+-根号3、7
2.x²﹢2x=0 x1=0 x2=2
3.x²-8x+15=0 X1=3 X2=5
4.x²-2x-99=0 X1=11 X2=-9
5.5x²+2x-1=0 X1,2=-1+-根号6
6.2(x-4)²﹢16=0 无解