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More answers

mn = -20

m + n = 8

Hence

m = 8 - n

Substitute

n(8 - n) = -20

8n - n^2 = -20

n^2 - 8n - 20 = 0

It is now in quadratic form .

Factor !!!!!

( n + 2)(n - 10) = 0

n = 2 & n = 10

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lenpollock

Lvl 16
9mo ago
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+10 and -2 .

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Wiki User

12y ago
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Q: What times what equals -20 but adds to plus 8?
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