Tim x, biet:
(2x-1)2-(2x+3).(2x-3)=0
tim x biet x-y=xy-1
cm x^3 -x^2 -2x^2 +2x chia het cho 6
tim x biet (x^2+2x+1)(x+2)-x^2(x-3)-7x(x-1)=3x-9
tim x biet
(5x-7) (x-9)-(-x+3)(-5x+2)=2x(x-4)-(x-1)(2x+3)
Tim x;biet:
(2x-3)2-(2x+1)2=-3
tim x biet
(2x=1)^2 - 4(x=2)^2=9
3(x-1)^2 -3x(x-5)=1
3(x+2)^2+ (2x-1)^2 =7
7(x+3)(x-3)=36
tim x;y biet
x-y=xy-1
cho x thuoc tap so nguyen biet
x^3 -x^2 -2x^2 +2x chia het cho 6
bai1:tim x biet
(x-2)2=1
(2x-1)^3= - 27
tim x biet x^2*(x-2)+x*(-3+2x)-5x=7
