2r^2-7r+1=-2

Solution for 2r^2-7r+1=-2 equation:

Simplifying
2r2 + -7r + 1 = -2

Reorder the terms:
1 + -7r + 2r2 = -2

Solving
1 + -7r + 2r2 = -2

Solving for variable 'r'.

Reorder the terms:
1 + 2 + -7r + 2r2 = -2 + 2

Combine like terms: 1 + 2 = 3
3 + -7r + 2r2 = -2 + 2

Combine like terms: -2 + 2 = 0
3 + -7r + 2r2 = 0

Factor a trinomial.
(1 + -2r)(3 + -1r) = 0

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

Simplifying
1 + -2r = 0

Solving
1 + -2r = 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 + -2r = 0 + -1

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

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

Divide each side by '-2'.
r = 0.5

Simplifying
r = 0.5
Subproblem 2
Set the factor '(3 + -1r)' equal to zero and attempt to solve:

Simplifying
3 + -1r = 0

Solving
3 + -1r = 0

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

Add '-3' to each side of the equation.
3 + -3 + -1r = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -1r = 0 + -3
-1r = 0 + -3

Combine like terms: 0 + -3 = -3
-1r = -3

Divide each side by '-1'.
r = 3

Simplifying
r = 3
Solution
r = {0.5, 3}