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OpenStudy (anonymous):
Please solve: x+y=8. xy=15.
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OpenStudy (anonymous):
x=8-y y(8-y)=15 0=y²-8y+15 0=(y-3)(y-5) that mean y = 3 or 5 when y = 3, x=8-(3)=5 when y=5 x=8-5=3
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