(x+9)(2x+1)=0

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Solution for (x+9)(2x+1)=0 equation:


Simplifying
(x + 9)(2x + 1) = 0

Reorder the terms:
(9 + x)(2x + 1) = 0

Reorder the terms:
(9 + x)(1 + 2x) = 0

Multiply (9 + x) * (1 + 2x)
(9(1 + 2x) + x(1 + 2x)) = 0
((1 * 9 + 2x * 9) + x(1 + 2x)) = 0
((9 + 18x) + x(1 + 2x)) = 0
(9 + 18x + (1 * x + 2x * x)) = 0
(9 + 18x + (1x + 2x2)) = 0

Combine like terms: 18x + 1x = 19x
(9 + 19x + 2x2) = 0

Solving
9 + 19x + 2x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(9 + x)(1 + 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 '(1 + 2x)' equal to zero and attempt to solve: Simplifying 1 + 2x = 0 Solving 1 + 2x = 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 + 2x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 2x = 0 + -1 2x = 0 + -1 Combine like terms: 0 + -1 = -1 2x = -1 Divide each side by '2'. x = -0.5 Simplifying x = -0.5

Solution

x = {-9, -0.5}

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