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What is the value of the expression 2x2 plus 3xy-4y2 when x equals 2 and y equals -4?
Wiki User
∙ 11y ago
2(2)2 + 3(2)(- 4) - 4(- 4)2
8 - 24 - 64
= - 80
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Wiki User
∙ 11y ago
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What is the value of n in the expression 12n plus 8 equals 11?
12n + 8 = 11 12n = 3 n = 1/4
