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h(-2)=4(-2)+5
We move all terms to the left:
h(-2)-(4(-2)+5)=0
We add all the numbers together, and all the variables
h(-2)+3=0
We multiply parentheses
-2h+3=0
We move all terms containing h to the left, all other terms to the right
-2h=-3
h=-3/-2
h=1+1/2
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