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Question

must be subtracted from (x3−3x2+5x−1) to get (2x3+x2−4x+2) .

A
x34x2+9x3
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B
x34x2+9x9
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C
x34x2+6x3
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Solution

The correct option is A x34x2+9x3
Let the expression to be subtracted be y.

Hence,
(x33x2+5x1)y=2x3+x24x+2

On rearranging the terms,
y=(x33x2+5x1)(2x3+x24x+2)

y=x33x2+5x12x3x2+4x2

y=x32x33x2x2+5x+4x12

y=x34x2+9x3

So we have to subtarct (x34x2+9x3) to get the required value.

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