(x+3)(x-3)(x^2+9)=0

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Solution for (x+3)(x-3)(x^2+9)=0 equation:


Simplifying
(x + 3)(x + -3)(x2 + 9) = 0

Reorder the terms:
(3 + x)(x + -3)(x2 + 9) = 0

Reorder the terms:
(3 + x)(-3 + x)(x2 + 9) = 0

Reorder the terms:
(3 + x)(-3 + x)(9 + x2) = 0

Multiply (3 + x) * (-3 + x)
(3(-3 + x) + x(-3 + x))(9 + x2) = 0
((-3 * 3 + x * 3) + x(-3 + x))(9 + x2) = 0
((-9 + 3x) + x(-3 + x))(9 + x2) = 0
(-9 + 3x + (-3 * x + x * x))(9 + x2) = 0
(-9 + 3x + (-3x + x2))(9 + x2) = 0

Combine like terms: 3x + -3x = 0
(-9 + 0 + x2)(9 + x2) = 0
(-9 + x2)(9 + x2) = 0

Multiply (-9 + x2) * (9 + x2)
(-9(9 + x2) + x2(9 + x2)) = 0
((9 * -9 + x2 * -9) + x2(9 + x2)) = 0
((-81 + -9x2) + x2(9 + x2)) = 0
(-81 + -9x2 + (9 * x2 + x2 * x2)) = 0
(-81 + -9x2 + (9x2 + x4)) = 0

Combine like terms: -9x2 + 9x2 = 0
(-81 + 0 + x4) = 0
(-81 + x4) = 0

Solving
-81 + x4 = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '81' to each side of the equation.
-81 + 81 + x4 = 0 + 81

Combine like terms: -81 + 81 = 0
0 + x4 = 0 + 81
x4 = 0 + 81

Combine like terms: 0 + 81 = 81
x4 = 81

Simplifying
x4 = 81

Reorder the terms:
-81 + x4 = 81 + -81

Combine like terms: 81 + -81 = 0
-81 + x4 = 0

Factor a difference between two squares.
(9 + x2)(-9 + x2) = 0

Factor a difference between two squares.
(9 + x2)((3 + x)(-3 + x)) = 0

Subproblem 1

Set the factor '(9 + x2)' equal to zero and attempt to solve: Simplifying 9 + x2 = 0 Solving 9 + x2 = 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 + x2 = 0 + -9 Combine like terms: 9 + -9 = 0 0 + x2 = 0 + -9 x2 = 0 + -9 Combine like terms: 0 + -9 = -9 x2 = -9 Simplifying x2 = -9 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 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 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3

Subproblem 3

Set the factor '(-3 + x)' equal to zero and attempt to solve: Simplifying -3 + x = 0 Solving -3 + x = 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 + x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + x = 0 + 3 x = 0 + 3 Combine like terms: 0 + 3 = 3 x = 3 Simplifying x = 3

Solution

x = {-3, 3}

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