if x+y=12 and xy=14 the find the
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Step-by-step explanation:
x+y=12
xy=14
x^2+y^2
=(x+y)^2-2xy
=(12)^2-2×14
=144-28
=116
(x-y)^2
=x^2+y^2-2xy
=116-2×14
=116-28
=88
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