0=7x^2+21

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Solution for 0=7x^2+21 equation: 



0=7x^2+21

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(7x^2+21)=0

We get rid of parentheses

-7x^2-21=0

a = -7; b = 0; c = -21;
Δ = b2-4ac
Δ = 02-4·(-7)·(-21)
Δ = -588
Delta is less than zero, so there is no solution for the equation

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