ISEE Mathematics Achievement Question 29: Answer and Explanation

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Question: 29

1. Solve for x: x2 + 5 = 41.

A. ± 6
B. ± 7
C. ± 8
D. ± 9

Correct Answer: A

Explanation:

The correct answer is (A).

If x2 + 5 = 41

x2 = 41 - 5

x2 = 36

x = ± 6