Q. 163.7( 3 Votes )

40 + 3x – x2=?
A. (5 + x) (x - 8)

B. (5 - x) (8 + x)

C. (5 + x) (8 - x)

D. (5 - x) (8 - x)

Answer :

40 + 3x – x2


Factorizing the equation and taking 8 and – x as common,


= 40 + 8x – 3x – x2


= 8(5 + x) – x(5 + x)


= (8 – x)(5 + x).

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