The degree of the polynomial obtained when x3−2x2+23 is subtracted from −18x2−2x+x3−14 is ________.
A
3
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B
1
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C
5
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D
2
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Solution
The correct option is D 2 (−18x2−2x+x3−14)−((x3−2x2+23) =(x3−x3)−(18x2−(−2x2))−(−2x)−(23−14) =(−16x2−2x−9) The degree of the resulting expression is 2, since the largest exponent is 2 in the resulting expression.