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Question

∣ ∣x+2x+3x+5x+4x+6x+9x+8x+11x+15∣ ∣ =

A
3x2+4x+5
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B
x3+8x+5
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C
0
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D
2
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Solution

The correct option is B 2
∣ ∣x+2x+3x+5x+4x+6x+9x+8x+11x+15∣ ∣ =∣ ∣x+2x+3x+5234456∣ ∣,R3R3R2,R2R2R1
=(x+2)(1820)(x+3)(1216)+(x+5)(1012), Expand along first row
=2x4+4x+122x10=2

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