Question

Помогите срочно даю 50 балов срочно

Answer 1

лашушыткокоцщыдвбаубуьлв

Answer 2

1)

$\frac{3x}{4y} *\frac{10}{3x^{2}} =\frac{3x*10}{4y*3x^{2}} =\frac{5}{2xy}$

2)

$\frac{3}{x^{2}-2x} *\frac{2x-4}{x} =\frac{3}{x(x-2)} *\frac{2(x-2)}{x} =\frac{6(x-2)}{x^{2}(x-2)} =\frac{6}{x^{2}}$

3)

$\frac{a-2b}{12c} *\frac{18c^{2}}{2b-a} =-\frac{2b-a}{12c} *\frac{18c^{2}}{2b-a} =-\frac{18c^{2}(2b-a)}{12c(2b-a)} =-\frac{3c}{2}$

4)

$\frac{x^{2}-16}{8x^{3}} *\frac{4x}{x+4} =\frac{(x-4)(x+4)}{8x^{3}} *\frac{4x}{x+4} =\frac{4x(x-4)(x+4)}{8x^{3}(x+4)} =\frac{x-4}{2x^{2}}$

5)

$\frac{5-y}{2y} *\frac{3y^{2}}{y^{2}-25} =-\frac{y-5}{2y} *\frac{3y^{2}}{(y-5)(y+5)} =-\frac{3y^{2}(y-5)}{2y(y-5)(y+5)} =-\frac{3y}{2(y+5)}$

6)

$\frac{c^{2}+4c+4}{2c-6} *\frac{c^{2}-9}{5c+10} =\frac{(c+2)^{2}}{2(c-3)} *\frac{(c-3)(c+3)}{5(c+2)} =\frac{(c+2)^{2}(c-3)(c+3)}{10(c-3)(c+2)} =\frac{(c+2)(c+3)}{10}$

7)

$(3a-6b)*\frac{a+2}{a^{2}-4b^{2}} =3(a-2b)*\frac{a+2}{(a-2b)(a+2b)} =\frac{3(a-2b)(a+2)}{(a-2b)(a+2b)} =\frac{3a+6}{a+2b}$

8)

$(\frac{c^{2}}{b} )^{3}*(\frac{b^{2}}{c^{4}} )^{2}=\frac{c^{6}}{b^{3}} *\frac{b^{4}}{c^{8}} =\frac{c^{6}b^{4}}{b^{3}c^{8}} =\frac{b}{c^{2}}$

9)

$\frac{45xy}{7z^{2}} *\frac{14xz^{3}}{81y^{2}} *\frac{27y^{3}}{5xz} =\frac{45*14*27x^{2}y^{4}z^{3}}{7*81*5xy^{2}z^{3}} =6xy^{2}$