Question

Answer 1

a: \(=\dfrac{\left(x-4\right)\left(x+4\right)}{x\left(4-x\right)}=\dfrac{-x-4}{x}\)

b: \(=\dfrac{\left(x+3\right)\cdot\left(x+1\right)}{2\left(x+3\right)}=\dfrac{x+1}{2}\)

c: \(=\dfrac{5x\left(x+y\right)^2\cdot3\cdot\left(x+y\right)}{5y\left(x+y\right)^2}=\dfrac{3x\left(x+y\right)}{y}\)

d: \(=\dfrac{\left(x-y\right)\cdot8}{10\cdot\left(x-y\right)}=\dfrac{4}{5}\)

e: \(=\dfrac{7\left(x+y\right)}{-3\left(x+y\right)}=-\dfrac{7}{3}\)

f: =x(x-y)/3y(x-y)=x/3y