(x+4)2-(x+2)2-x2=7

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Solution for (x+4)2-(x+2)2-x2=7 equation: 



(x+4)2-(x+2)2-x2=7

We move all terms to the left:

(x+4)2-(x+2)2-x2-(7)=0

We add all the numbers together, and all the variables

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

We multiply parentheses

-1x^2+2x-2x+8-4-7=0

We add all the numbers together, and all the variables

-1x^2-3=0

a = -1; b = 0; c = -3;
Δ = b2-4ac
Δ = 02-4·(-1)·(-3)
Δ = -12
Delta is less than zero, so there is no solution for the equation

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