Answer:
[tex]1) \frac{6a^5b^7}{-2a^3b^7}[/tex]
- [tex]\frac{6a^5b^7}{2a^3b^7}[/tex]
- [tex]\frac{3a^5b^7}{a^3b^7}[/tex]
- [tex]\frac{a^5}{a^3}=a^{5-3}[/tex]
- [tex]\frac{3a^2b^7}{b^7}[/tex]
[tex]-3a^2[/tex]
_____________
[tex]2)\frac{-20x^3y^2}{-5x^3y}[/tex]
[tex]\frac{20x^3y^2}{5x^3y}[/tex]
[tex]\frac{20y^2}{5y}[/tex]
[tex]\frac{5\cdot \:4y^2}{5y}[/tex]
[tex]\frac{4y^2}{y}[/tex]
[tex]\frac{y^{2} }{y}[/tex]
[tex]4y[/tex]
__________
[tex]3)\frac{-16ab^4}{4b^3}[/tex]
[tex]\frac{-4\cdot \:4ab^4}{4b^3}[/tex]
[tex]\frac{-4ab^4}{b^3}[/tex]
[tex]\frac{b^{4} }{b^{3} } =b[/tex]
[tex]-4ab[/tex]
____________
[tex]4)\frac{21m^8n^5}{27m^5n^4}[/tex]
[tex]\frac{3\cdot \:7m^8n^5}{27m^5n^4}[/tex]
[tex]\frac{3\cdot \:7m^8n^5}{3\cdot \:9m^5n^4}[/tex]
[tex]\frac{7m^8n^5}{9m^5n^4}[/tex]
[tex]\frac{7m^3n^5}{9n^4}[/tex]
[tex]\frac{7m^3n}{9}[/tex]
____________
[tex]5)\frac{-15x^5y^4}{45xy^3}[/tex]
[tex]\frac{-15x^5y^4}{15\cdot \:3xy^3}[/tex]
[tex]\frac{-x^5y^4}{3xy^3}[/tex]
[tex]\frac{-x^4y^4}{3y^3}[/tex]
[tex]\frac{-x^4y}{3}[/tex]
[tex]-\frac{x^4y}{3}[/tex]
__________
[tex]6)\frac{7p^2q^2}{14p^2q^2}[/tex]
[tex]\frac{7q^2}{14q^2}[/tex]
[tex]\frac{7}{14}[/tex]
[tex]\frac{1}{2}[/tex]
___________
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