# SAT Math Multiple Choice Practice Question 305: Answer and Explanation

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**Question: 305**

**19.** If is a solution of the equation where *c* is a constant, what is another value of *x* that satisfies the equation?

A. -5

B. -2

C. 1

D. 2

E. 5

**Correct Answer:** E

**Explanation:**

**E** Substitute into the equation to find *c*.

Factor the quadratic (remember that since is a solution, (*x* + 1) must be a factor):

So the solutions are and