alibaba00

Giải các phương trình
a)$\dfrac{4x}{4x^2-8x+7}+\dfrac{3x}{4x^2-10x+7}=1$
b)$x^2+\dfrac{9x^2}{(x+3)^2}=27$
$c)\dfrac{1}{x^2+9x+20}+\dfrac{1}{x^2+11x+30}+\dfrac{1}{x^2+13x+42}=\dfrac{1}{18}$
$d)(x+2)^2+(x+3)^3+(x+4)^4=2$
$d)x^2+(\dfrac{x}{x-1})^2=8$
$e)\dfrac{x(5-x)}{x+1}(x+\dfrac{5-x}{x+1}=6$
$f)5(\dfrac{x-2}{x+1})^2-44(\dfrac{x+2}{x-1})^2+12\dfrac{x^2-4}{x^2-1}=0$
$h)3(x^2-x+1)^2-2x(x+1)^2=5(x^3+1)$

Giải phương trình:
$x^4-3x^3+6x^2+3x+1=0$
$x^4+10x^3+26x^2+1=0$
$(x^2-x+1)^4+5x^4=6x^2(x^2-x+1)^2$