SAT College

The product of a number and 2 less than the number is 15. Find the number
A) -3 or 5
B)-2 or 6
C)-6 or 2
D) -5 or 3

Answers

Answer 1
x(x-2) = 15 where x = the unknown number
If you test all the answers in that equation, both x values in answer A yield 15, so the answer is A

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