Use negative exponents where necessary to write the expression with all variables in the numerator of a term. That is,
write each term in the form c $c x ^ { n }$ if the term contains a variable.
-$$y = 7 x ^ { 2 } + 5 - \frac { 3 } { x } + \frac { 3 } { x ^ { 2 } }$$
A) $y = 7 x ^ { 2 } + 5 + x ^ { - 1 } + x ^ { - 2 }$
B) $y = 7 x ^ { 2 } + 5 - 3 x ^ { - 1 } + 3 x ^ { - 2 }$
C) $y = 5 - 3 x ^ { - 1 } + 10 x ^ { - 2 }$
D) $y = 7 x ^ { 2 } + 5 - ( 3 x ) ^ { - 1 } + ( 3 x ) ^ { - 2 }$

Question

Quizplus · Accepted Answer

To rewrite the expression with all variables in the numerator, negative exponents are used for terms in the denominator. Thus, $\frac{3}{x}$ becomes $3x^{-1}$ and $\frac{3}{x^2}$ becomes $3x^{-2}$, matching option B.

Use Negative Exponents Where Necessary to Write the Expression with All