SAT Math Multiple Choice Practice Question 71: Answer and Explanation

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Question: 71

5. Question below deals with the equation , where .

For what value of x does this equation have no solution?

A. -2
B. -1
C. 0
D. 1
E. 2

Correct Answer: A


A. Two big things are illegal in algebra: You can't take the square root of a negative number, and you can't divide by zero. The denominator here is x + 2, which would equal zero when x = -2, so -2 is your forbidden value.

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