-9=-7+4x^2

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Solution for -9=-7+4x^2 equation: 



-9=-7+4x^2

We move all terms to the left:

-9-(-7+4x^2)=0

We get rid of parentheses

-4x^2+7-9=0

We add all the numbers together, and all the variables

-4x^2-2=0

a = -4; b = 0; c = -2;
Δ = b2-4ac
Δ = 02-4·(-4)·(-2)
Δ = -32
Delta is less than zero, so there is no solution for the equation

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