下面有8道题用因试分解法解下列方程
1. x^2+2x-3=0 2. 2x^2-7x+6=0 3. x(x-2)=3 4. x^2=2x 5. 3(x-1)=x(1-x) 6. 4x^2-9=0
7. 2(x+1)^2=18 8. (2x-3)^2+3(2x-3)+2=0
写详细的过程 要真的会数学的才答哦!
下面有8道题用因试分解法解下列方程
1. x^2+2x-3=0 2. 2x^2-7x+6=0 3. x(x-2)=3 4. x^2=2x 5. 3(x-1)=x(1-x) 6. 4x^2-9=0
7. 2(x+1)^2=18 8. (2x-3)^2+3(2x-3)+2=0
写详细的过程 要真的会数学的才答哦!
1.(x-1)(x+3)=0,x1=-3,x2=1
2.(2x-3)(x-2)=0,x1=3/2,x2=2
3.x^2-2x-3=0,(x+1)(x-3)=0,x1=-1,x2=3
4.x^2-2x=0,x(x-2)=0,x1=0,x2=2
5.3(x-1)-x(1-x)=0,(x-1)(x+3)=0,x1=-3,x2=1
6.(2x+3)(2x-3)=0,x1=-3/2,x2=3/2
7.(x+1)2-9=0,(x+1-3)(x+1+3)=0,(x-2)(x+4)=0,x1=-4,x2=2
8.(2x-3+1)(2x-3+2)=0,2(x-1)(2x-1)=0,x1=1/2,x2=1
1. x^2+2x-3=0
x²+2x-3=0
(x-1)(x+3)=0
2. 2x^2-7x+6=0 、
2x²-7x+6=0
(2x-3)(x-2)=0
3. x(x-2)=3
x²-2x-3=0
(x-3)(x+1)=0
4. x^2=2x
x²-2x=0
x(x-2)=0
5. 3(x-1)=x(1-x)
3(x-1)-x(1-x)=0
3(x-1)+x(x-1)=0
(x+3)(x-1)=0
6. 4x^2-9=0
4x²-9=0
(2x-3)(2x+3)=0
7. 2(x+1)^2=18
2x²+4x+2-18=0
2x²+4x-16=0
x²+2x-8=0
(x+4)(x-2)=0
8. (2x-3)^2+3(2x-3)+2=0
(2x-3+1)(2x-3+2)=0
(2x-2)(2x-1)=0
2(x-1)(2x-1)=0