Helenshouse
Divide:
5x^220x/4x9 divide by x4/4x9



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saifoo.khan
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\[\frac{5x^220x}{4x9} \div \frac{ x4}{4x9 }\]Change the divide sign:
\[\frac{5x^220x}{4x9} \times \frac{ 4x9}{x4 }\]

Helenshouse
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Ok I get that part, then what?

kmalone99
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factor a 5x out of the top and you get 5x(x4)

saifoo.khan
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\[\frac{5x^220x}{\cancel{4x9}} \times \frac{ \cancel{4x9}}{x4 }\]

ChmE
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Do you see something in the top and bottom that can cancel out before you do any factoring?

ChmE
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@saifoo.khan just illustrated my point

Helenshouse
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I was going to say 4x9

Helenshouse
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Change sign, cancel out, what is the next step

saifoo.khan
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dw:1350791060484:dw

ChmE
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factor out a common multiple would be the next step illustrated above

Helenshouse
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Ohhh I get it!

ChmE
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We got lucky with this problem and you can see another canceling out possibility

Helenshouse
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yes