(x^2+7)(x^2-9)=

Solution for (x^2+7)(x^2-9)= equation:

Simplifying
(x2 + 7)(x2 + -9) = 0

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

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

Multiply (7 + x2) * (-9 + x2)
(7(-9 + x2) + x2(-9 + x2)) = 0
((-9 * 7 + x2 * 7) + x2(-9 + x2)) = 0
((-63 + 7x2) + x2(-9 + x2)) = 0
(-63 + 7x2 + (-9 * x2 + x2 * x2)) = 0
(-63 + 7x2 + (-9x2 + x4)) = 0

Combine like terms: 7x2 + -9x2 = -2x2
(-63 + -2x2 + x4) = 0

Solving
-63 + -2x2 + x4 = 0

Solving for variable 'x'.

Factor a trinomial.
(-7 + -1x2)(9 + -1x2) = 0

Factor a difference between two squares.
(-7 + -1x2)((3 + x)(3 + -1x)) = 0

Subproblem 1
Set the factor '(-7 + -1x2)' equal to zero and attempt to solve:

Simplifying
-7 + -1x2 = 0

Solving
-7 + -1x2 = 0

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

Add '7' to each side of the equation.
-7 + 7 + -1x2 = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -1x2 = 0 + 7
-1x2 = 0 + 7

Combine like terms: 0 + 7 = 7
-1x2 = 7

Divide each side by '-1'.
x2 = -7

Simplifying
x2 = -7

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}