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simplify (3x)/(3x+21)*[(x+7)/(9x^2)] assume that all expressions are defined

Guest Feb 9, 2015

Best Answer 

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$$\frac{3x(3x+21)}{(x+7)(9x^2)}=\frac{9x(x+7)}{(x+7)9x^2}=\frac{1}{x}$$

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Alan  Feb 9, 2015
 #1
avatar+26969 
+5
Best Answer

 

$$\frac{3x(3x+21)}{(x+7)(9x^2)}=\frac{9x(x+7)}{(x+7)9x^2}=\frac{1}{x}$$

.

Alan  Feb 9, 2015

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