Question

Упростите. Номер 2.11 а)

Answer 1

$\frac{3a}{a-3} - \frac{5+a}{2a-6} * \frac{54}{ a^{2}+5a } = \frac{3a}{a-3}- \frac{5+a}{2(a-3)}* \frac{54}{a(a+5)}= \frac{3a}{a-3} - \frac{27}{a(a-3)} = \frac{3 a^{2}-27 }{a(a-3)}=$$\frac{3( a^{2}-9) }{a(a-3)}= \frac{3(a-3)(a+3)}{a(a-3)} = \frac{3a+9}{a}$

Answer 2

1)(5+a)/2(a-3)*54/a(a+5)=27/a(a-3)
2)3a/(a-3)-27/a(a-3)=(3a²-27)/a(a-3)=3(a-3)(a+3)/a(a-3)=3(a+3)/a=(3a+9)/a