x^2-3x=-21

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Solution for x^2-3x=-21 equation: 



x^2-3x=-21

We move all terms to the left:

x^2-3x-(-21)=0

We add all the numbers together, and all the variables

x^2-3x+21=0

a = 1; b = -3; c = +21;
Δ = b2-4ac
Δ = -32-4·1·21
Δ = -75
Delta is less than zero, so there is no solution for the equation

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