1.x-√3=-4x(x-√3)
(x-√3)(1+4x)=0
x=√3或-1/4
2.(2x+√3)(5x+√7)=0
x=-√3/2或-√7/5
3.[3(x-2)+4(x+1)][3(x-2)-4(x+1)]=0
-(7x-2)(x+10)=0
x=2/7或-10
4.[(2x+1)+1][(2x+1)+2]=0
2(x+1)(2x+3)=0
x=-1或-3/2
5.(x+√3)[x+(1+√3)]=0
x=-√3或-(1+√3)
7.[(x-3)+(x-5)][(x-3)-(x-5)]+(x+4)²-17x-24=0
2 (2x-8)+(x+4)²-17x-24=0
(x+4)²-13x-40=0
x²-5x-24=0
(x+3)(x-8)=0
x=-3或8
8.(x+a)[x+(a+1)]=0
x=-a或-(a+1)
9.15x²-5√2x-3√3x+√6=0
(3x-√2)(5x-√3)=0
x=√2/3或√3/5
10.(x-√2)[(1+√2)x-1]=0
x=√2或1/(1+√2)
11.x²-3x-4=0 (x>0) 或 x²+3x-4=0 (x0)或 (x+4)(x-1)=0 (x