(3a - 1)2 - 6a + 2 is equal to:
(3a - 1)(a - 1)
3(3a - 1)(a - 1)
(3a - 1)(a + 1)
3(3a - 1)(a + 1)
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Solving,
⇒ (3a - 1)2 - 6a + 2
⇒ (3a)2 + 12 - 2 x 3a x 1 - 6a + 2
⇒ 9a2 + 1 - 6a - 6a + 2
⇒ 9a2 - 12a + 3
⇒ 3(3a2 - 4a + 1)
⇒ 3(3a2 - 3a - a + 1)
⇒ 3[3a(a - 1) - 1(a - 1)]
⇒ 3(3a - 1)(a - 1).
Hence, option 2 is the correct option.
Answered By
L.C.M. of x2 + 3x + 2 and x2 - 2x - 3 in simplest form is:
(x + 1)2(x + 2)(x + 3)
(x2 + 3x + 2)(x2 - 2x - 3)
(x + 1)(x + 2)(x - 3)
none of these
H.C.F of x2 + 3x + 2 and x2 - 2x - 3 is :
(x + 1)
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