Digital PSAT Math Practice Question 221: Answer and Explanation

Question: 221

The expression

• A.
• B.
• C.
• D.

Correct Answer: C

Explanation:

(C) FOIL this like you'd FOIL any other equation:

. The coefficient in front of the x² can be reduced, giving:

. To combine the x terms, they need to have a common denominator:

. Combining these terms gives you , or (C).