SOLUTION: If x-y = 7, xy= -8, What is the value of x^2 + 3xy + y^2 ?

SOLUTION: If x-y = 7, xy= -8, What is the value of x^2 + 3xy + y^2 ?

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Question 894316: If x-y = 7, xy= -8, What is the value of x^2 + 3xy + y^2 ?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

So then,

Substituting,

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