Bài 1 : Tìm x
a) x(x-5)+(x-5)=0
b) 2x(x-4)-x+4=0
c)x(x+3)+2x+6=0
d) (x+2)^2-9=0
e) ( 2x+1)^2 -4=0
Bài 2 : tìm x
a) 4x(x+1)=8(x+1)
b) x(x-1)-2(1-x)=0
c) 2x(x-2)-(2-x)^2=0
d) ( x-3)^3+3-x=0
g) 5x(x-2000)-x+2000=0
h) x^2-4x=0
g) ( 1-x)^2 -1+x=0
k) (1-x)^2-1+x=0
m) x +6x^2=0
Bài 3 :
a) ( 2x +1)^2 -4(x+2)^2 =9
b) ( x+3)^2-( x-4)(x-8) =1
c) 3(x+2)^2 + ( 2x-1)^2-7(x+3)(x-3)=36
d) ( x-3)(x^2+3x+9)+x(x+2)(x-2)=1
Loga
Sinh Học lớp 12
