x^2+6^2-21=4x^2+24

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Solution for x^2+6^2-21=4x^2+24 equation: 



x^2+6^2-21=4x^2+24

We move all terms to the left:

x^2+6^2-21-(4x^2+24)=0

We add all the numbers together, and all the variables

x^2-(4x^2+24)+15=0

We get rid of parentheses

x^2-4x^2-24+15=0

We add all the numbers together, and all the variables

-3x^2-9=0

a = -3; b = 0; c = -9;
Δ = b2-4ac
Δ = 02-4·(-3)·(-9)
Δ = -108
Delta is less than zero, so there is no solution for the equation

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