0=21x2-14x+7

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Solution for 0=21x2-14x+7 equation: 



0=21x^2-14x+7

We move all terms to the left:

0-(21x^2-14x+7)=0

We add all the numbers together, and all the variables

-(21x^2-14x+7)=0

We get rid of parentheses

-21x^2+14x-7=0

a = -21; b = 14; c = -7;
Δ = b2-4ac
Δ = 142-4·(-21)·(-7)
Δ = -392
Delta is less than zero, so there is no solution for the equation

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