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What is the value of the expression 2x2 + 3xy – 4y2 when x = 2 and y = –4?

What is the value of the expression 2x2 + 3xy – 4y2 when x = 2 and y = –4?
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What is the value of the expression 2x2 + 3xy – 4y2 when x = 2 and y = –4?

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User Matthias Bauch
by
8.3k points

1 Answer

4 votes

Answer:

-80

Explanation:

2(2)^2+3(2)(-4)-4(-4)^2

2(4)+3(-8)-4(16)

8-24-64

-16-64

-80

answered
User Irfan Mulic
by
8.6k points
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