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Equations in Quadratic Form
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ACCUPLACER
AAF.051 Equations in Quadratic Form
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Choose the substitution-and-solution pair that correctly solves (x + 2/x)
2
- 9 = 0 in quadratic form.
A
u = x + 2/x; x = -2, -1, 1, 2
B
u = x
2
; x = -2, -1, 1, 2
C
u = x - 2/x; x = (3 - sqrt(17))/2, (3 + sqrt(17))/2, (-3 - sqrt(17))/2, (-3 + sqrt(17))/2
D
u = x + 2/x; x = -3, 3
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