5x-15=x2+6

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Solution for 5x-15=x2+6 equation: 



5x-15=x2+6

We move all terms to the left:

5x-15-(x2+6)=0

We add all the numbers together, and all the variables

-(+x^2+6)+5x-15=0

We get rid of parentheses

-x^2+5x-6-15=0

We add all the numbers together, and all the variables

-1x^2+5x-21=0

a = -1; b = 5; c = -21;
Δ = b2-4ac
Δ = 52-4·(-1)·(-21)
Δ = -59
Delta is less than zero, so there is no solution for the equation

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