Question

1. One of the factors of (9X^2 - 1) -(1 + 3X)^2, is

(a) 3+x
(b) 3 - x
(c) 3x - 1
(c) 3x + 1​

Answer 1

Answer:

3x+1

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Answer 2

Explanation:

$(9x {}^{2} - 1) - (1 + 3x) {}^{2} \\ =9x {}^{2} - 1 - (1 + 6x + 9x {}^{2} ) \\ =9x {}^{2} - 1 - 1 - 6x - 9x {}^{2} \\ = - 6x - 2 \\ = - 2(3x + 1)$

So one of the factors is: 3x+1.

So your answer is⭐

d)3x+1✔✔✔✔

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