Question

помогите пожалуйста решить примеры​

Answer 1

а)

$\frac{3a^{3}-6a^{2}}{a+2}:(a-2)=\frac{3a^{2}(a-2)}{(a+2)(a-2)} =\frac{3a^{2}}{a+2} =\frac{3*(-3.5)^{2}}{-3.5+2} =-24.5$

б)

$(5x+15y):\frac{x^{2}-9y^{2}}{x-y} =5(x+3y):\frac{(x-3y)(x+3y)}{x-y} =5(x+3y)*\frac{x-y}{(x-3y)(x+3y)} =\\\\=\frac{5(x-y)}{x-3y} =\frac{5(2.5-1.5)}{2.5-3*1.5} =-2.5$