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What is the value of the ecpression 2x^2+3xy-4y^2when x=2 and y=-4?

What is the value of the ecpression 2x^2+3xy-4y^2when x=2 and y=-4?
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What is the value of the ecpression 2x^2+3xy-4y^2when x=2 and y=-4?

User Cporte
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The answer to this is -80
User Idrees
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