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Solving Quadratics by Completing the Square
Grade Level
PSAT Prep
071 Solving Quadratics by Completing the Square
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A spreadsheet model for monthly profit is reduced to a quadratic in m. The situation can be modeled by 2m
2
+ 6m - 19/2 = 0. Which solution set is correct?
A
m = 3/2 - sqrt(7) or m = 3/2 + sqrt(7)
B
m = -3/2 - sqrt(6) or m = -3/2 + sqrt(6)
C
m = -3/2 - sqrt(7) or m = -3/2 + sqrt(7)
D
m = -3/2 - sqrt(8) or m = -3/2 + sqrt(8)
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