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-5a(a-1)-2a=23-a
We move all terms to the left:
-5a(a-1)-2a-(23-a)=0
We add all the numbers together, and all the variables
-5a(a-1)-2a-(-1a+23)=0
We add all the numbers together, and all the variables
-2a-5a(a-1)-(-1a+23)=0
We multiply parentheses
-5a^2-2a+5a-(-1a+23)=0
We get rid of parentheses
-5a^2-2a+5a+1a-23=0
We add all the numbers together, and all the variables
-5a^2+4a-23=0
a = -5; b = 4; c = -23;
Δ = b2-4ac
Δ = 42-4·(-5)·(-23)
Δ = -444
Delta is less than zero, so there is no solution for the equation
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