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coldgirl [10]
3 years ago
12

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

Mathematics
1 answer:
Bumek [7]3 years ago
5 0
Please use " ^ " to denote exponentiation:  <span>2x^2 + 3xy – 4y^2

Now let x=2 and y= -4:

2(2)^2 + 3(2)(-4) - 4(-4)^2 = 8 - 24 -4(16) = -16 - 4(16) = -5(16) = -80 (answer)</span>
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