Question

Помогите пожалуйста.

Answer 1

а.) 3mn-6n/2m³:m²n-4n/4m⁴= 3n(m-2)*2m/n(m²-4)=3*2m/m+2=6m/m+2

Answer 2

$1) = frac{3n*(m-2)}{2m^3} * frac{4m^4}{m^2n-4n} = 3n*(m-2)*frac{2m}{n*(m^2-4}) = 3(m-2)*frac{2m}{(m-2)*(m+2)} = 3*frac{2m}{m+2} = frac{6m}{m+2} \\2) = (2a-b)^2 * frac{2}{(2a-b)*(2a+b)} = (2a-b) * frac{2}{2a+b} = frac{4a-2b}{2a+b} \\3) = frac{(x-3)*(x+3)}{(x+2)^2} * frac{x+2}{x-3} = frac{x+3}{x+2} \\4) = frac{a}{(a+2)*(a^2-2a+4)} * frac{(a+2)^2}{a^2} = frac{a}{a^2-2a+4} * (a+2) = frac{a^2+2a}{a^2-2a+4}$