Solve the equation by making an appropriate substitution.(x2 - 2x)2 - 23(x2 - 2x) + 120 = 0
A. {- 3, - 2, 5, 4}
B. {15, 8}
C. {- 3, - 2, 15, 8, 5, 4}
D. {5, 4}
Answer: A
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