SOLUTION: 3xy-4x+y x equals -3 and y equals 2 both the 4x and y are squared

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Question 147565: 3xy-4x+y
x equals -3 and y equals 2
both the 4x and y are squared
Answer by jim_thompson5910(21667) About Me  (Show Source):
You can put this solution on YOUR website!

3%2Ax%2Ay-4%2Ax%5E2%2By%5E2 Start with the given expression.


3%2A%28-3%29%2A2-4%2A%28-3%29%5E2%2B%282%29%5E2 Plug in x=-3 and y=2


-9%2A2-4%2A%28-3%29%5E2%2B%282%29%5E2 Multiply 3 and -3 to get -9.


-18-4%2A%28-3%29%5E2%2B%282%29%5E2 Multiply -9 and 2 to get -18.


-18-4%2A9%2B%282%29%5E2 Raise -3 to the 2nd power to get 9.


-18-36%2B%282%29%5E2 Multiply 4 and 9 to get 36.


-54%2B%282%29%5E2 Subtract 36 from -18 to get -54.


-54%2B4 Raise 2 to the 2nd power to get 4.


-50 Add -54 and 4 to get -50.


So 3%2A%28-3%29%2A2-4%2A%28-3%29%5E2%2B%282%29%5E2=-50


So 3%2Ax%2Ay-4%2Ax%5E2%2By%5E2=-50 when x=-3 and y=2