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What numbers add up to -5 and multiply to get -90
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What numbers add up to -5 and multiply to get -90
asked
Apr 27, 2015
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What numbers add up to -5 and multiply to get -90
Mathematics
high-school
Dabljues
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Dabljues
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6
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You don't say
how many
numbers you want to do that with.
If you want just two numbers, then they're
+7.3107
and
-12.3107
.
(Those are rounded, not exact.)
I took a quick look among the factors of 90, looking for sets of
3 numbers
that would do it, and I couldn't find any.
Bouncner
answered
Apr 28, 2015
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Bouncner
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let
x-------> the first number
y-------> the second number
we know that
equation 1
equation 2
substitute the equation 1 in equation 2
using a graphical tool to resolve the second order equation
see the attached figure
the numbers are
-12.311
7.311
Jayms
answered
May 1, 2015
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Jayms
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