Question

Giúp giùm nha

Answer 1

a) = \(\frac{x^2}{x\left(x-3\right)}+\frac{9-6x}{x\left(x-3\right)}\)

= \(\frac{x^2-6x+9}{x\left(x-3\right)}\)

= \(\frac{\left(x-3\right)^2}{x\left(x-3\right)}\)

= \(\frac{x-3}{x}\)

b) = \(\frac{3\left(2x-1\right)}{x}.\frac{3x^2}{\left(2x-1\right)\left(2x+1\right)}\)

= \(\frac{3.3x}{2x+1}\)

=\(\frac{9x}{2x+1}\)

Answer 2

c) = \(\frac{20x+40}{60x}+\frac{12x-60}{60x}-\frac{15x+120}{60x}\)

= \(\frac{17x-140}{60x}\)

d) = \(\frac{x^2-x+1}{x\left(x+1\right)}.\frac{x+1}{3x-2}.\frac{3\left(3x-2\right)}{x^2-x+1}\)

= \(\frac{3}{x}\)

Chúc bạn làm bài tốt