(2x+5)(x+9)=0

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Solution for (2x+5)(x+9)=0 equation:


Simplifying
(2x + 5)(x + 9) = 0

Reorder the terms:
(5 + 2x)(x + 9) = 0

Reorder the terms:
(5 + 2x)(9 + x) = 0

Multiply (5 + 2x) * (9 + x)
(5(9 + x) + 2x * (9 + x)) = 0
((9 * 5 + x * 5) + 2x * (9 + x)) = 0
((45 + 5x) + 2x * (9 + x)) = 0
(45 + 5x + (9 * 2x + x * 2x)) = 0
(45 + 5x + (18x + 2x2)) = 0

Combine like terms: 5x + 18x = 23x
(45 + 23x + 2x2) = 0

Solving
45 + 23x + 2x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(9 + x)(5 + 2x) = 0

Subproblem 1

Set the factor '(9 + x)' equal to zero and attempt to solve: Simplifying 9 + x = 0 Solving 9 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + x = 0 + -9 x = 0 + -9 Combine like terms: 0 + -9 = -9 x = -9 Simplifying x = -9

Subproblem 2

Set the factor '(5 + 2x)' equal to zero and attempt to solve: Simplifying 5 + 2x = 0 Solving 5 + 2x = 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 + 2x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 2x = 0 + -5 2x = 0 + -5 Combine like terms: 0 + -5 = -5 2x = -5 Divide each side by '2'. x = -2.5 Simplifying x = -2.5

Solution

x = {-9, -2.5}

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