Question

MCQ 1. (3x-1) (3x+1)
A) 6 X square 2 - 1
B) 6 X square 2 + 1
C) 9 X square 2 + 1
D) None​

Answer 1

Answer:

(a+b)(a-b)= a²-b²

(3x-1)(3x+1)= (3x)² -(1)²

= 9x²-1 is a right answer

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Answer 2

Answer:

None. The answer is supposed to be 9x²-1