r2+82=(r+5)2

Solution for r2+82=(r+5)2 equation:

r2+82=(r+5)2

We move all terms to the left:

r2+82-((r+5)2)=0

We add all the numbers together, and all the variables

r^2-((r+5)2)+82=0


We calculate terms in parentheses: -((r+5)2), so:

(r+5)2

We multiply parentheses

2r+10

Back to the equation:

-(2r+10)


We get rid of parentheses

r^2-2r-10+82=0

We add all the numbers together, and all the variables

r^2-2r+72=0

a = 1; b = -2; c = +72;
Δ = b2-4ac
Δ = -22-4·1·72
Δ = -284
Delta is less than zero, so there is no solution for the equation