5(x^2-7)-x^2(x^2-7)=0

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Solution for 5(x^2-7)-x^2(x^2-7)=0 equation: 


Simplifying
5(x2 + -7) + -1x2(x2 + -7) = 0

Reorder the terms:
5(-7 + x2) + -1x2(x2 + -7) = 0
(-7 * 5 + x2 * 5) + -1x2(x2 + -7) = 0
(-35 + 5x2) + -1x2(x2 + -7) = 0

Reorder the terms:
-35 + 5x2 + -1x2(-7 + x2) = 0
-35 + 5x2 + (-7 * -1x2 + x2 * -1x2) = 0
-35 + 5x2 + (7x2 + -1x4) = 0

Combine like terms: 5x2 + 7x2 = 12x2
-35 + 12x2 + -1x4 = 0

Solving
-35 + 12x2 + -1x4 = 0

Solving for variable 'x'.

Factor a trinomial.
(-7 + x2)(5 + -1x2) = 0


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

Simplifying
-7 + x2 = 0

Solving
-7 + x2 = 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 + x2 = 0 + 7

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

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

Simplifying
x2 = 7

Take the square root of each side:
x = {-2.645751311, 2.645751311}

Subproblem 2
Set the factor '(5 + -1x2)' equal to zero and attempt to solve:

Simplifying
5 + -1x2 = 0

Solving
5 + -1x2 = 0

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

Add '-5' to each side of the equation.
5 + -5 + -1x2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -1x2 = 0 + -5
-1x2 = 0 + -5

Combine like terms: 0 + -5 = -5
-1x2 = -5

Divide each side by '-1'.
x2 = 5

Simplifying
x2 = 5

Take the square root of each side:
x = {-2.236067978, 2.236067978}
Solution
x = {-2.645751311, 2.645751311, -2.236067978, 2.236067978}

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