Question

Write an equivalent expression with postive exponets only

Answer 1

The answer is choice A

Answer 2

Answer: Choice A

$\frac{x^4}{y^2}$

x^4 over y^2

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Explanation:

The negative exponent is effectively an indication to apply the reciprocal. This is because of the general rule that

$x^{-k} = \frac{1}{x^k}$

So this means

$y^{-2} = \frac{1}{y^2}$

and furthermore

$x^4y^{-2} = x^4*\frac{1}{y^2} = \frac{x^4}{y^2}$

which is why choice A is the answer