1 Answer

Kajbo · Answer 1 · 2022-07-25T12:02:59+0000

A negative exponent means that the factor is on the wrong side of the fraction.

$(2)/(x^(-3)) = (2\cdot x^3)/(1)$

The
x^(-3) belongs in the top of the fraction, but when it moves across the fration bar, the sign on the exponent changes.

Applying that to your example,

$(z^4)/(z^(-7)) = (z^4\cdot z^7)/(1) \text{~~~~or~~~~} z^4 \cdot z^7$

You then need to simplify that last expression,
$z^4 \cdot z^7$ . How many z's are being multiplied together in that expression?

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