(5x+4)(x+5)=

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Solution for (5x+4)(x+5)= equation: 


Simplifying
(5x + 4)(x + 5) = 0

Reorder the terms:
(4 + 5x)(x + 5) = 0

Reorder the terms:
(4 + 5x)(5 + x) = 0

Multiply (4 + 5x) * (5 + x)
(4(5 + x) + 5x * (5 + x)) = 0
((5 * 4 + x * 4) + 5x * (5 + x)) = 0
((20 + 4x) + 5x * (5 + x)) = 0
(20 + 4x + (5 * 5x + x * 5x)) = 0
(20 + 4x + (25x + 5x2)) = 0

Combine like terms: 4x + 25x = 29x
(20 + 29x + 5x2) = 0

Solving
20 + 29x + 5x2 = 0

Solving for variable 'x'.

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


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

Simplifying
5 + x = 0

Solving
5 + x = 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 + x = 0 + -5

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

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

Simplifying
x = -5

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

Simplifying
4 + 5x = 0

Solving
4 + 5x = 0

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

Add '-4' to each side of the equation.
4 + -4 + 5x = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 5x = 0 + -4
5x = 0 + -4

Combine like terms: 0 + -4 = -4
5x = -4

Divide each side by '5'.
x = -0.8

Simplifying
x = -0.8
Solution
x = {-5, -0.8}

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