Find the term that should be added to the expression to form a perfect square trinomial. Write the resulting perfect square trinomial in factored form.x2 - 18x
A. 81; 
2
B. 81; 
2
C. 0; 
2
D. 81; 
2
Answer: B
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Use a calculator to find ? to the nearest tenth of a degree, if 
and
?
with ? in QII
?
__________°
Fill in the blank(s) with the appropriate word(s).