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0=10500-400+3x^2
We move all terms to the left:
0-(10500-400+3x^2)=0
We add all the numbers together, and all the variables
-(10500-400+3x^2)=0
We get rid of parentheses
-3x^2-10500+400=0
We add all the numbers together, and all the variables
-3x^2-10100=0
a = -3; b = 0; c = -10100;
Δ = b2-4ac
Δ = 02-4·(-3)·(-10100)
Δ = -121200
Delta is less than zero, so there is no solution for the equation
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