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Question

Solve 9a2+19a2−2−12a+43a

A
(4a13a)(a13a+4)
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B
(2a13a)(3a12a4)
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C
(a13a)(3a1a+4)
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D
(3a13a)(3a13a4)
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Solution

The correct option is B (3a13a)(3a13a4)
9a2+19a2212a+43a
=(3a)2+(13a)22(3a)(13a)4(3a13a)
=(3a13a)24(3a13a)
=(3a13a)(3a13a4)

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