evaluate the following algebraic expressions
x²-3x²y-4x+7 if x=-2,y=2
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x²-3x²y-4x+7
putting X = -2 and y = 2
(-2)² - 3(-2)²(2) - 4 (-2) + 7
4 - 24 + 8 + 7
-20 + 15
-5
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