r^4+3r^3=4r^2

Solution for r^4+3r^3=4r^2 equation:

Simplifying
r4 + 3r3 = 4r2

Reorder the terms:
3r3 + r4 = 4r2

Solving
3r3 + r4 = 4r2

Solving for variable 'r'.

Reorder the terms:
-4r2 + 3r3 + r4 = 4r2 + -4r2

Combine like terms: 4r2 + -4r2 = 0
-4r2 + 3r3 + r4 = 0

Factor out the Greatest Common Factor (GCF), 'r2'.
r2(-4 + 3r + r2) = 0

Factor a trinomial.
r2((-4 + -1r)(1 + -1r)) = 0

Subproblem 1
Set the factor 'r2' equal to zero and attempt to solve:

Simplifying
r2 = 0

Solving
r2 = 0

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

Simplifying
r2 = 0

Take the square root of each side:
r = {0}
Subproblem 2
Set the factor '(-4 + -1r)' equal to zero and attempt to solve:

Simplifying
-4 + -1r = 0

Solving
-4 + -1r = 0

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

Add '4' to each side of the equation.
-4 + 4 + -1r = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -1r = 0 + 4
-1r = 0 + 4

Combine like terms: 0 + 4 = 4
-1r = 4

Divide each side by '-1'.
r = -4

Simplifying
r = -4
Subproblem 3
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 = {0, -4, 1}