Mathematics
Factorise the following:
9x2 - 1
Factorisation
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Answer
9x2 - 1 = (3x)2 - (1)2.
Using identity,
a2 - b2 = (a + b)(a - b).
(3x)2 - (1)2 = (3x + 1)(3x - 1).
Hence, 9x2 - 1 = (3x + 1)(3x - 1).
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Factorise the following:
9x2 - 1
17 Likes
9x2 - 1 = (3x)2 - (1)2.
Using identity,
a2 - b2 = (a + b)(a - b).
(3x)2 - (1)2 = (3x + 1)(3x - 1).
Hence, 9x2 - 1 = (3x + 1)(3x - 1).
Answered By
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