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-29
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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
x =(16+/-sqrt(256+180))/2
x = 18.44 and -2.44
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Earn +20 ptsQ: What times what equals -45 and adds up to 16?
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