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Q.

In the expansion of x22-2x28, the third term from the last

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a

448x8

b

448x6

c

428x8

d

324x2

answer is B.

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Detailed Solution

T3 from last in x22-2x28

=T3 from beginning in -2x2+x228

=C2  8 -2x26 x222 =28 (16)x8=448x8

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