Question

помогите , срочно !!!!

Answer 1

3) $5-frac{4m+5n}{n} =frac{5n}{n} -frac{4m+5n}{n} =frac{5n-4m-5n}{n}= frac{-4m}{n}$

4) $frac{a^{2} + b^{2}} {2a-b}+2a+b= frac{a^{2}+b^{2}}{2a-b} +frac{2a(2a-b)}{2a-b}+ frac{b(2a-b)}{2a-b} =frac{a^{2}+b^{2}+4a^{2}-2ab+2ab-b^{2}}{2a-b} =frac{5a^{2}}{2a-b}$

Answer 2

1) 5n-(4m+5n)/n;

5-4m-5n/n;

-4m/n.

2)a^2+b^2+2a*(2a-b)+b*(2a-b)/2a-b;

a^2+b^2+4a^2-2ab+2ab-b^2/2a-b;

a^2+4a^2/2a-b;

5a^2/2a-b.