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Question

Simplify: (x5)(x3)(x29x+14)(x212x+35)(x3).

A
x1
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B
x2
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C
x7
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D
(x1)(x2)
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Solution

The correct option is D x2
(x5)(x3)(x29x+14)(x212x+35)(x3) ---- ( 1 )

x29x+14=x27x2x+14=x(x7)2(x7)=(x7)(x2) ---- ( 2 )

x212x+35=x27x5x+35=x(x7)5(x7)=(x5)(x7) ---- ( 3 )

(x5)(x3)(x7)(x2)(x5)(x7)(x3) [ Substituting equation ( 2 ) and ( 3 ) in equation ( 1 ) ]

(x2)

(x5)(x3)(x29x+14)(x212x+35)(x3)=(x2)

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