15) What is the result of adding 17 to its opposite?
A)
-34
B)
0
C)
17
D)
34

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(m+11n)^2=(m+11n)(m+11n)=m^2+11mn+11mn+121n^2=m^2+22mn×121n^2 for example; use foil: (a+b)(a+b)first. a^2outside. abinside. ablast. b^2