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anonymous
 5 years ago
with quadratic equations how do I know when to add or subtract!
anonymous
 5 years ago
with quadratic equations how do I know when to add or subtract!

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Where are you asking about adding or subtracting?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0well with \[1\pm \sqrt{1^2 4(1)(4)} \] would this be a situation to add since a neg 4 times a neg 4 is a positive 16

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0okay beacuse in my math book there is a similar one and they subtracted. it was \[2 \pm \sqrt{2^2  4(5)(2)} \over 2(5)\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Well, you add inside the square root for both cases because you're multiplying two negative numbers together.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0right but the answer in the book depends on it being subtracted. So is the book just plain wrong?
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