Factor by grouping to obtain the difference of two squares.z2 - x2 + 10xy - 25y2
A. (z + x + 5y)(z - x - 5y)
B. (z + x + 5y)(z - x + 5y)
C. (z + x - 5y)(z - x + 5y)
D. (z + x - 5y)(z - x - 5y)
Answer: C
Mathematics
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