Determine the constant that should be added to the binomial so that it becomes a perfect square trinomial. Then write and factor the trinomial.x2 + 18x
A. 9; x2 + 18x + 9 = (x + 81)2
B. 324; x2 + 18x + 324 = (x + 18)2
C. 18; x2 + 18x + 18 = (x + 324)2
D. 81; x2 + 18x + 81 = (x + 9)2
Answer: D
Mathematics
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