### Home > A2C > Chapter 1 > Lesson 1.1.3 > Problem 1-37

1-37.

Nissos and Chelita were arguing over a math problem. Nissos was trying to explain to Chelita that she had made a mistake in finding the *-*intercepts of the function

*.*

*“No*

*way!”*Chelita exclaimed.

*“I know how to find* -intercepts! You make the equal to zero and solve for . I know I did this right!”Here is Chelita’s work:

Step 1:

Step 2:

Therefore,

Step 3:

So

* * or

Nissos tried to explain to Chelita that she had done something wrong. What is Chelita’s error? Justify and explain your answer completely.

Notice that

She made a sign error while factoring. The correct factorization is