7-x-x2=12

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Solution for 7-x-x2=12 equation: 



7-x-x2=12

We move all terms to the left:

7-x-x2-(12)=0

We add all the numbers together, and all the variables

-1x^2-1x-5=0

a = -1; b = -1; c = -5;
Δ = b2-4ac
Δ = -12-4·(-1)·(-5)
Δ = -19
Delta is less than zero, so there is no solution for the equation

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