Denise G. answered 01/16/20
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Plugging everything into the expressions:
(a+h)2-12(a+h)+5-[a2-12a+5]
Simplify using FOIL and the the distributive property:
a2+2ah+h2-12a-12h+5-a2+12a-5
Simplify by seeing which terms cancel:
2ah+h2-12h