douglas12
Solve the equation: x^2 + 5x + 22 = 0
A. 0
B. 2.5
C. 15.75
D. No solution



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uri
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@douglas12 Quad equation?

douglas12
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I think so.


uri
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a:1
b:5
c:22

douglas12
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so is the answer B

abb50
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to check, substitute
is (2.5)^2 + 5(2.5) + 22 = 0?
if yes, then you're right. if not, try again

douglas12
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No it's not 0

abb50
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then pick another letter and keep on substituting. i for one think it's faster (only applicable in multiple choice questions)