Question

Answer 1

Bài 10:

a: \(=\dfrac{2x}{3}\cdot\dfrac{6x^2}{5}=\dfrac{12x^3}{15}=\dfrac{4x^3}{5}\)

b: \(=16x^2y^2\cdot\dfrac{-5}{18x^2y^5}=\dfrac{-40}{9y^3}\)

c: \(=\dfrac{25x^3y^5}{45xy^2}=\dfrac{5}{9}x^2y^3\)

d: \(=\dfrac{\left(x-y\right)\left(x+y\right)}{6x^2y}\cdot\dfrac{3xy}{x+y}=\dfrac{\left(x-y\right)}{2x}\)

e: \(=\dfrac{a\left(a+b\right)}{-\left(a-b\right)}\cdot\dfrac{2\left(a-b\right)\left(a+b\right)}{a+b}=-2a\left(a+b\right)\)

f: \(=\dfrac{-\left(x+y\right)}{x-y}\cdot\dfrac{3\left(x-y\right)\left(x+y\right)}{x\left(x+y\right)}=\dfrac{-3\left(x+y\right)}{x}\)