Question

Решите ,пожалуйста Даю много баллов

Answer 1

$\displaystyle\bf\\1)\\\\\frac{a^{2} -3ab}{3b^{2}-ab } =\frac{a\cdot(a-3b)}{b\cdot(3b-a)} =-\frac{a\cdot(a-3b)}{b\cdot(a-3b)} =-\frac{a}{b} \\\\2)\\\\\frac{x^{3}+2x^{2} y+xy^{2} }{x^{3} +x^{2} y} =\frac{x\cdot(x^{2} +2xy+y^{2} )}{x^{2} \cdot(x+y)} =\frac{(x+y)^{2} } {x\cdot(x+y)} =\frac{x+y}{x} \\\\3)\\\\\frac{x^{5} -x^{3} y^{2} }{x^{2} +xy} =\frac{x^{3}\cdot(x^{2} -y^{2} ) }{x(x+y)} =\frac{x^{2} \cdot(x+y)(x-y)}{x+y}=x^{2} \cdot(x-y) =x^{3}-x^{2} y$