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