Blueprint MCAT Formerly Next Step
Return to Blog Homepage

PCAT Quantitative Reasoning – Domain of a Polynomial

A. {x | x ≠ 3}
B. {x | x ≠ –3}
C. {x | x ≠ 3 and x ≠ 0}
D. {x | x ≠ –3 and x ≠ 0}

Click for Explanation

D is correct. First, let’s factor to simplify this expression:

We know that the function is undefined if there is a value of zero in the denominator, so it must be true that:

x ≠ 3 and x ≠ 0

Submit a Comment

Submit a Comment

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.