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What two numbers when added equals negative 10 and when multiplied equal 9?
Wiki User
∙ 12y ago
x = first number
y = 2nd number
x+ y = -10
y = -10-x
also,
xy = 9
x(-10-x) = 9
-10x -x2 -9 = 0
x2 +10x + 9 = 0
(x+1)(x+9) = 0
X = -1 and substitute find y = -9
Ans: -1, -9
Wiki User
∙ 12y ago
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