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x^2-10x+25=-5
We move all terms to the left:
x^2-10x+25-(-5)=0
We add all the numbers together, and all the variables
x^2-10x+30=0
a = 1; b = -10; c = +30;
Δ = b2-4ac
Δ = -102-4·1·30
Δ = -20
Delta is less than zero, so there is no solution for the equation
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