r^2+r+5=7

Solution for r^2+r+5=7 equation:

Simplifying
r2 + r + 5 = 7

Reorder the terms:
5 + r + r2 = 7

Solving
5 + r + r2 = 7

Solving for variable 'r'.

Reorder the terms:
5 + -7 + r + r2 = 7 + -7

Combine like terms: 5 + -7 = -2
-2 + r + r2 = 7 + -7

Combine like terms: 7 + -7 = 0
-2 + r + r2 = 0

Factor a trinomial.
(-2 + -1r)(1 + -1r) = 0

Subproblem 1
Set the factor '(-2 + -1r)' equal to zero and attempt to solve:

Simplifying
-2 + -1r = 0

Solving
-2 + -1r = 0

Move all terms containing r to the left, all other terms to the right.

Add '2' to each side of the equation.
-2 + 2 + -1r = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -1r = 0 + 2
-1r = 0 + 2

Combine like terms: 0 + 2 = 2
-1r = 2

Divide each side by '-1'.
r = -2

Simplifying
r = -2
Subproblem 2
Set the factor '(1 + -1r)' equal to zero and attempt to solve:

Simplifying
1 + -1r = 0

Solving
1 + -1r = 0

Move all terms containing r to the left, all other terms to the right.

Add '-1' to each side of the equation.
1 + -1 + -1r = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -1r = 0 + -1
-1r = 0 + -1

Combine like terms: 0 + -1 = -1
-1r = -1

Divide each side by '-1'.
r = 1

Simplifying
r = 1
Solution
r = {-2, 1}