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Cedrick Olson

Lvl 10
3y ago
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Wiki User

11y ago

XY= -45

X+Y = 16

Y = 16-X

X(16-X) = -45

16X -X2 + 45 = 0

multiply both sides by -1

x2 -16X - 45 = 0

use quadratic formula

x =(16+/-sqrt(256+180))/2

x = 18.44 and -2.44

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Q: What times what equals -45 and adds up to 16?
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