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(H)=-16^2+64H+80
We move all terms to the left:
(H)-(-16^2+64H+80)=0
We get rid of parentheses
H-64H-80+16^2=0
We add all the numbers together, and all the variables
-63H+176=0
We move all terms containing H to the left, all other terms to the right
-63H=-176
H=-176/-63
H=2+50/63
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