if x-y=17,xy=89,find the value of x²+y²
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2
Answer:
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Answered by
0
Answer:
111
Step-by-step explanation:
=x^2-y^2=x^2+y^2-2xy
=17^2=x^2+y^2-2×89
=17^2=x^2+y^2-178
=289-178=x^2+y^2
=111=x^2+y^2
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