X^2+8x=-21

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Solution for X^2+8x=-21 equation: 



X^2+8X=-21

We move all terms to the left:

X^2+8X-(-21)=0

We add all the numbers together, and all the variables

X^2+8X+21=0

a = 1; b = 8; c = +21;
Δ = b2-4ac
Δ = 82-4·1·21
Δ = -20
Delta is less than zero, so there is no solution for the equation

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