SOLUTION: what is the value of the expression 2x to the second power + 3xy - 4y to the second power when x=2 and y= -4 please explain

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Question 203174: what is the value of the expression 2x to the second power + 3xy - 4y to the second power when x=2 and y= -4 please explain
Answer by rfer(3325) About Me  (Show Source):
You can put this solution on YOUR website!
substitute the values for x & y and solve
2x^2+3xy-4y
2(4)+3(2)(-4)-(4)(-4)
8-24+16=0