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

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Solution for 4(x+2)(2x+5)=0 equation:


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

Reorder the terms:
4(2 + x)(2x + 5) = 0

Reorder the terms:
4(2 + x)(5 + 2x) = 0

Multiply (2 + x) * (5 + 2x)
4(2(5 + 2x) + x(5 + 2x)) = 0
4((5 * 2 + 2x * 2) + x(5 + 2x)) = 0
4((10 + 4x) + x(5 + 2x)) = 0
4(10 + 4x + (5 * x + 2x * x)) = 0
4(10 + 4x + (5x + 2x2)) = 0

Combine like terms: 4x + 5x = 9x
4(10 + 9x + 2x2) = 0
(10 * 4 + 9x * 4 + 2x2 * 4) = 0
(40 + 36x + 8x2) = 0

Solving
40 + 36x + 8x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '4'.
4(10 + 9x + 2x2) = 0

Factor a trinomial.
4((5 + 2x)(2 + x)) = 0

Ignore the factor 4.

Subproblem 1

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

Subproblem 2

Set the factor '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2

Solution

x = {-2.5, -2}

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