a)x(2x-3)-6+4x=0

b)x^3+2x^2+x=0

c)x^2-6x+8=0

a)x(x+5)=x+5

b)x^2-1/9=0

c)(2x-3)^2-(x+5)^2=0

a)45^2+90.155+155^2

b)9x^2+42x+49 tại x = 1 

c(x^2-3x)+x-3 tại x = 103

1/x^2+x-2-x/x+1

e)x/2a-b-4ax/4a^2-b^2+b/2a+b

a)x/x^2+2x+1+3/5x^2-5

b)x^2 +2/x^3-1+2/x^2+x+1+1/1-x

c)2x+1/2x-1-2x-1/2x+1

d)1/x^2+x-2-x/x+1

e)x/2a-b-4ax/4a^2-b^2+b/2a+b

có bước trung gian ạ

2x+3/10x-4+5-3x/4-10x

(5x - 1)/(3x^2y) + (x + 1)/(3x^2y)