Multiply the polynomials.(5x2 + 9y)(-4x2 + 9y + z)

A. -20x4 + 9x2y2 + 81y2
B. -20x2 + 9xy + 5x2z + 81y2 + 9z
C. -20x4 + 9x2y + 81y4 + 5x2yz
D. -20x4 + 9x2y + 5x2z + 81y2 + 9yz

Answer: D

Mathematics

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