Use substitution to factor the polynomial.10x4 + 21x2 + 9
A. (10x2 + 3)(x2 + 3)
B. (2x2 + 1)(5x2 + 9)
C. (2x2 + 3)(5x2 + 3)
D. (5x2 - 3)(2x2 - 3)
Answer: C
Mathematics
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D.
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