Use a special product formula to simplify.[(m - 9) - n][(m - 9) + n]
A. m2 - 18m + 81 - n2
B. m2 - 18m + 81 + 2mn + 18n - n2
C. m2 + 18m + 81 - n2
D. m2 + 81 - n2
Answer: A
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Graph the equation in the rectangular coordinate system.4x = 8
A. 
B. 
C. 
D. 