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Mathematics 8 Online
OpenStudy (anonymous):

(11x^5)(9x^12)

mathslover (mathslover):

\[\large{\frac{11x^5}{9x^{12}}}\] \[\large{\frac{11}{9}\times \frac{x^5}{x^{12}}}\]

mathslover (mathslover):

Do remember that : \[\large{\frac{a^b}{a^c}=a^{b-c}}\]

mathslover (mathslover):

hence \[\large{\frac{x^5}{x^12}=x^{5-12}=x^{-7}}\]

mathslover (mathslover):

sorry I meant x^{12} there

OpenStudy (anonymous):

tx

mathslover (mathslover):

hence we get : \[\large{\frac{11}{9}\times x^{-7}}\] now : \[\large{a^{-n}=\frac{1}{a^n}}\] hence we get : \[\large{\frac{11}{9}\times \frac{1}{x^7}}\]

OpenStudy (anonymous):

confused...are the exponents added together to make 99^17 or multiplied to make 99x^60?

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