Multiply.(z2 + 4z - 9)(z2 - z - 5)
A. z4 + 3z3 - 18z2 - 11z + 45
B. -5z4 - 5z3 - 10z2 - 11z - 45
C. -5z4 - 20z3 + 45z2
D. z4 + 3z3 - 14z2 - 29z - 45
Answer: A
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.
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