SOLUTION: Evaluate the polynomial when x=5 and y=-9. x^2-3y^2+2xy

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Question 610968: Evaluate the polynomial when x=5 and y=-9.
x^2-3y^2+2xy
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
x^2-3y^2+2xy

(5)^2-3(-9)^2+2(5)(-9)

25-3(81)+2(5)(-9)

25-243-90

-308

So x^2-3y^2+2xy = -308 when x = 5 and y = -9
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