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Q.

If x-42x2x2xx-42x2x2xx-4 = (A + Bx)(x-A)2 then the ordered pair (A, B) is equal to

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a

(4, 5) 

b

(-4,-5)

c

(-4,3)

d

(-4, 5)

answer is D.

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Detailed Solution

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R1R1+R2+R3 =(5x-4) 1112xx-42x2x2xx-4 =(5x-4) 1002x-x-402x0-x-4      C2C2-C1,C3C3-C1 =(5x-4) (x+4)2    

  A=-4, B=5

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