7x^2-1=-4

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Solution for 7x^2-1=-4 equation: 



7x^2-1=-4

We move all terms to the left:

7x^2-1-(-4)=0

We add all the numbers together, and all the variables

7x^2+3=0

a = 7; b = 0; c = +3;
Δ = b2-4ac
Δ = 02-4·7·3
Δ = -84
Delta is less than zero, so there is no solution for the equation

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