x^2-4-3x(x+2)=0

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Solution for x^2-4-3x(x+2)=0 equation:


Simplifying
x2 + -4 + -3x(x + 2) = 0

Reorder the terms:
x2 + -4 + -3x(2 + x) = 0
x2 + -4 + (2 * -3x + x * -3x) = 0
x2 + -4 + (-6x + -3x2) = 0

Reorder the terms:
-4 + -6x + x2 + -3x2 = 0

Combine like terms: x2 + -3x2 = -2x2
-4 + -6x + -2x2 = 0

Solving
-4 + -6x + -2x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '-2'.
-2(2 + 3x + x2) = 0

Factor a trinomial.
-2((2 + x)(1 + x)) = 0

Ignore the factor -2.

Subproblem 1

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

Subproblem 2

Set the factor '(1 + x)' equal to zero and attempt to solve: Simplifying 1 + x = 0 Solving 1 + x = 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 + x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0 + -1 x = 0 + -1 Combine like terms: 0 + -1 = -1 x = -1 Simplifying x = -1

Solution

x = {-2, -1}

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