Question

Представте в виде дроби выражение

​

Answer 1

Объяснение:

=$\frac{12}{1}-\frac{b*1}{ba}-\frac{a*1}{ab}=\frac{ab*12}{ab*1}-\frac{b}{ab} -\frac{a}{ab}= \frac{12ab}{ab} -\frac{b}{ab} -\frac{a}{ab} =\frac{12ab-b-a}{ab}$

=$\frac{48a-3(a-1)-4(a+2)}{12} = \frac{48a-3a+3-4a-8}{12} = \frac{48a+3-8}{12} =\frac{41a-5}{12}$

=$\frac{2a^{2}+3ab-(a^{2}+b^{2}) }{a} = \frac{2a^{2}+3ab-a^{2}-b^{2} }{a} =\frac{a^{2}+3ab-b^{2} }{a}$

=$\frac{5a^{2}-3ab-(3a^{2}-b^{2} ) }{a}= \frac{5a^{2}-3ab-3a^{2} +b^{2} }{a} =\frac{2a^{2} -3ab+b^{2} }{a}$