Algebrahard · Past Paper
Factorize: x^2 + 2x - y^2 + 1
A(x+1+y)(x+1-y)
B(x-1+y)(x-1-y)
C(x+y+1)^2
D(x+1)^2-y^2
✓ Correct Answer: A — (x+1+y)(x+1-y)
Rearrange: (x^2+2x+1) - y^2 = (x+1)^2 - y^2.
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