一元二次方程[因式分解法](2x-1)^2-1=0(3x+8)^2-(2x-3)^2=0y(y-2)=3(x-1)(x+2)=10
一元二次方程[因式分解法]
(2x-1)^2-1=0
(3x+8)^2-(2x-3)^2=0
y(y-2)=3
(x-1)(x+2)=10
(2x-1)^2-1=0
(2x-1+1)(2x-1-1)=0
2x(2x-2)=0
4x(x-1)=0
x(x-1)=0
x=0或x=1
(3x+8)^2-(2x-3)^2=0
(3x+8+2x-3)(3x+8-2x+3)=0
(5x+5)(x+11)=0
5(x+1)(x+11)=0
(x+1)(x+11)=0
x=-1或x=-11
y(y-2)=3
y^2-2y-3=0
(y-3)(y+1)=0
y=3或-1
(x-1)(x+2)=10
x^2+x-2=10
x^2+x-12=0
(x+4)(x-3)=0
x=-4或x=3
(1)4x²-4x+1-1=4x(x-1)
x=1,0
(2)9x²+48x+64-4x²+12x-9
=5x²+60x+55
=(5x+5)(x+11)
x=-1,-11
(3)y²-2y-3
=(y-3)(y+1)
y=-1,3
(4)x²+x-12
(x+4)(x-3)
x=-4,3
1、
(2x-1+1)(2x-1-1)=0
2x(2x-2)=0
4x(x-1)=0
x=0,x=1
2、
(3x+8+2x-3)(3x+8-2x+3)=0
(5x+5)(x+11)=0
5(x+1)(x+11)=0
x=-1,x=-11
3、
y²-2y-3=0
(y-3)(y+1)=0
y=3,y=-1
4、
x²+x-2-10=0
x²+x-12=0
(x+4)(x-3)=0
x=-4,x=3
(1)2x(2x-2)=0
x=0或1
(2)(5x+5)(x+11)=0
x=-1或-11
(3)(y-3)(y+1)=0
y=3或-1
(4)(x+4)(x-3)=0
x=3或-4