Question

X+Y=27 XY=72 Find X and Y

Answer 1

GIVEN,

x+y=27

xy=72

y=72/x

x+72/x=27

x²+72=27x

x²-27x+72=0

x²-24x-3x+72=0

x(x-24)-3(x-24)=0

x=24,3

IF X=24,

xy=72

24y=72

y=3

IF X=3,

xy=72

3y=72

y=24

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