-x2+13=-7x+28

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Solution for -x2+13=-7x+28 equation: 



-x2+13=-7x+28

We move all terms to the left:

-x2+13-(-7x+28)=0

We add all the numbers together, and all the variables

-1x^2-(-7x+28)+13=0

We get rid of parentheses

-1x^2+7x-28+13=0

We add all the numbers together, and all the variables

-1x^2+7x-15=0

a = -1; b = 7; c = -15;
Δ = b2-4ac
Δ = 72-4·(-1)·(-15)
Δ = -11
Delta is less than zero, so there is no solution for the equation

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