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a*a+1=(a+3)(a-2)
We move all terms to the left:
a*a+1-((a+3)(a-2))=0
Wy multiply elements
a^2-((a+3)(a-2))+1=0
We multiply parentheses ..
a^2-((+a^2-2a+3a-6))+1=0
We calculate terms in parentheses: -((+a^2-2a+3a-6)), so:We get rid of parentheses
(+a^2-2a+3a-6)
We get rid of parentheses
a^2-2a+3a-6
We add all the numbers together, and all the variables
a^2+a-6
Back to the equation:
-(a^2+a-6)
a^2-a^2-a+6+1=0
We add all the numbers together, and all the variables
-1a+7=0
We move all terms containing a to the left, all other terms to the right
-a=-7
a=-7/-1
a=+7
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