z^{3 }^{ }Times 5

35z 4z^{2}

z^{3 }^{ }Times 5

35z 4z^{2}

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Expanding the fraction allows you to see and/or reduce the numerator and the denominator.

From multiplication, across the top we see:

z^3 x 5

across the the bottom we get:

35z x 4z^2

From expansion we get:

z*z*z*5

/

35*z*4*z*z

all of the z's at the top cancel the z's at the bottom. The five at the top reduces to 1, and the 35 at the bottom reduces to 7.

This leaves 1/7*4, which results to 1/28.

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## Comments

Thanks again Luke, but that's not one of the multiple choices. I have:

a.) z^3/28z^2

b.) 1/28

c.) 1/28z

I neglected the 4 in the denominator on my first look at it. But my method still applies: cancel the z's, then reduce what you have left of the fraction.