-13u-4=3u^2

Solution for -13u-4=3u^2 equation:

Simplifying
-13u + -4 = 3u2

Reorder the terms:
-4 + -13u = 3u2

Solving
-4 + -13u = 3u2

Solving for variable 'u'.

Combine like terms: 3u2 + -3u2 = 0
-4 + -13u + -3u2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(4 + 13u + 3u2) = 0

Factor a trinomial.
-1((4 + u)(1 + 3u)) = 0

Ignore the factor -1.
Subproblem 1
Set the factor '(4 + u)' equal to zero and attempt to solve:

Simplifying
4 + u = 0

Solving
4 + u = 0

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

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

Combine like terms: 4 + -4 = 0
0 + u = 0 + -4
u = 0 + -4

Combine like terms: 0 + -4 = -4
u = -4

Simplifying
u = -4
Subproblem 2
Set the factor '(1 + 3u)' equal to zero and attempt to solve:

Simplifying
1 + 3u = 0

Solving
1 + 3u = 0

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

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

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

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

Divide each side by '3'.
u = -0.3333333333

Simplifying
u = -0.3333333333
Solution
u = {-4, -0.3333333333}