epmg123 epmg123

13-08-2016
Mathematics

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want to ask how to do it . n some concepts I don't understand for example

want to ask how to do it n some concepts I dont understand for example class=

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dalendrk dalendrk

13-08-2016

[tex]3^2=3\cdot3=9\\(3)^2=(3)\cdot(3)=9\\3^2=(3)^2\\\\but\ (-3)^2=(-3)\cdot(-3)=9\ and\ -3^2=-3\cdot3=-9\to(-3)^2\neq-3^2[/tex]

[tex]\dfrac{15^m}{3^n}=\dfrac{(5\cdot3)^m}{3^n}=\dfrac{5^m\cdot3^m}{3^n}=5^m\cdot3^{m-n}[/tex]

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