Algebrahard · Past Paper
Factorize: a^2 - 4b^2 - 4b - 1
A(a+2b+1)(a-2b-1)
B(a-2b+1)(a+2b-1)
C(a+2b+1)^2
D(a-2b-1)^2
✓ Correct Answer: A — (a+2b+1)(a-2b-1)
a^2 - (4b^2+4b+1) = a^2 - (2b+1)^2 = (a+2b+1)(a-2b-1).
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✓ Correct Answer: A — (a+2b+1)(a-2b-1)
a^2 - (4b^2+4b+1) = a^2 - (2b+1)^2 = (a+2b+1)(a-2b-1).
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