4x(x+1)=5-15x

Solution for 4x(x+1)=5-15x equation:

Simplifying
4x(x + 1) = 5 + -15x

Reorder the terms:
4x(1 + x) = 5 + -15x
(1 * 4x + x * 4x) = 5 + -15x
(4x + 4x2) = 5 + -15x

Solving
4x + 4x2 = 5 + -15x

Solving for variable 'x'.

Reorder the terms:
-5 + 4x + 15x + 4x2 = 5 + -15x + -5 + 15x

Combine like terms: 4x + 15x = 19x
-5 + 19x + 4x2 = 5 + -15x + -5 + 15x

Reorder the terms:
-5 + 19x + 4x2 = 5 + -5 + -15x + 15x

Combine like terms: 5 + -5 = 0
-5 + 19x + 4x2 = 0 + -15x + 15x
-5 + 19x + 4x2 = -15x + 15x

Combine like terms: -15x + 15x = 0
-5 + 19x + 4x2 = 0

Factor a trinomial.
(-5 + -1x)(1 + -4x) = 0

Subproblem 1
Set the factor '(-5 + -1x)' equal to zero and attempt to solve:

Simplifying
-5 + -1x = 0

Solving
-5 + -1x = 0

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

Add '5' to each side of the equation.
-5 + 5 + -1x = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -1x = 0 + 5
-1x = 0 + 5

Combine like terms: 0 + 5 = 5
-1x = 5

Divide each side by '-1'.
x = -5

Simplifying
x = -5
Subproblem 2
Set the factor '(1 + -4x)' equal to zero and attempt to solve:

Simplifying
1 + -4x = 0

Solving
1 + -4x = 0

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

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

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

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

Divide each side by '-4'.
x = 0.25

Simplifying
x = 0.25
Solution
x = {-5, 0.25}