(2x-5)(x+4)+20=0

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Solution for (2x-5)(x+4)+20=0 equation:


Simplifying
(2x + -5)(x + 4) + 20 = 0

Reorder the terms:
(-5 + 2x)(x + 4) + 20 = 0

Reorder the terms:
(-5 + 2x)(4 + x) + 20 = 0

Multiply (-5 + 2x) * (4 + x)
(-5(4 + x) + 2x * (4 + x)) + 20 = 0
((4 * -5 + x * -5) + 2x * (4 + x)) + 20 = 0
((-20 + -5x) + 2x * (4 + x)) + 20 = 0
(-20 + -5x + (4 * 2x + x * 2x)) + 20 = 0
(-20 + -5x + (8x + 2x2)) + 20 = 0

Combine like terms: -5x + 8x = 3x
(-20 + 3x + 2x2) + 20 = 0

Reorder the terms:
-20 + 20 + 3x + 2x2 = 0

Combine like terms: -20 + 20 = 0
0 + 3x + 2x2 = 0
3x + 2x2 = 0

Solving
3x + 2x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), 'x'.
x(3 + 2x) = 0

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

Subproblem 2

Set the factor '(3 + 2x)' equal to zero and attempt to solve: Simplifying 3 + 2x = 0 Solving 3 + 2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 2x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 2x = 0 + -3 2x = 0 + -3 Combine like terms: 0 + -3 = -3 2x = -3 Divide each side by '2'. x = -1.5 Simplifying x = -1.5

Solution

x = {0, -1.5}

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