What is the value of (3x3 + 5x2y + 12xy2 + 7y3), when x = – 4 and y = – 1?
Correct Answer :
– 327
Solution :
The correct answer is – 327.
We need to evaluate the expression at and .
Let us first compute each power we will need:
Now substitute into each term one by one:
Term 1:
Term 2:
Term 3:
Term 4:
Now add all four terms together:
Therefore, the value of when and is – 327.
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