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Coleman Kuhic
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∙ 3y agoThis answer is:
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∙ 12y agoxy = -112
x + y = 3
x = 3-y
y(3-y) = -112
3y - y + 112 =0
-y + 3y + 112 = 0, which has no simple factorisation. Use the quadratic formula:
x = [-b +- sqrt(b - 4ac)]/2a
x = [-3 +- sqrt(457)]/-2
Case one:
x = 3/2 + sqrt(457)/2
x ~ 12.1888
Case two:
x = 3/2 - sqrt(457)
x ~ -9.1888
So x and y = 12.188 and -9.1888.
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