(x^2-9)(x^2+16)=0

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Solution for (x^2-9)(x^2+16)=0 equation:


Simplifying
(x2 + -9)(x2 + 16) = 0

Reorder the terms:
(-9 + x2)(x2 + 16) = 0

Reorder the terms:
(-9 + x2)(16 + x2) = 0

Multiply (-9 + x2) * (16 + x2)
(-9(16 + x2) + x2(16 + x2)) = 0
((16 * -9 + x2 * -9) + x2(16 + x2)) = 0
((-144 + -9x2) + x2(16 + x2)) = 0
(-144 + -9x2 + (16 * x2 + x2 * x2)) = 0
(-144 + -9x2 + (16x2 + x4)) = 0

Combine like terms: -9x2 + 16x2 = 7x2
(-144 + 7x2 + x4) = 0

Solving
-144 + 7x2 + x4 = 0

Solving for variable 'x'.

Factor a trinomial.
(-16 + -1x2)(9 + -1x2) = 0

Factor a difference between two squares.
(-16 + -1x2)((3 + x)(3 + -1x)) = 0

Subproblem 1

Set the factor '(-16 + -1x2)' equal to zero and attempt to solve: Simplifying -16 + -1x2 = 0 Solving -16 + -1x2 = 0 Move all terms containing x to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + -1x2 = 0 + 16 Combine like terms: -16 + 16 = 0 0 + -1x2 = 0 + 16 -1x2 = 0 + 16 Combine like terms: 0 + 16 = 16 -1x2 = 16 Divide each side by '-1'. x2 = -16 Simplifying x2 = -16 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 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 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 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

Solution

x = {-3, 3}

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