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What two numbers multiply to give you -20 but add to give you positive 1?
Updated: 4/28/2022
Wiki User
∙ 12y agoBest Answer
-19
Darrell Zboncak
Lvl 10
∙ 3y agoThis answer is:
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Wiki User
∙ 12y agoThe numbers are 5 and -4.
Let the two numbers be x and y. Our two equations can then be written as:
xy = -20 and x + y = 1
x (1-x) = -20
x - x2 = -20
x2 - x = 20
x2 - x - 20 = 0 factors to (x+4)(x-5) = 0
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