x^4-16x^2+225=0

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Solution for x^4-16x^2+225=0 equation:


Simplifying
x4 + -16x2 + 225 = 0

Reorder the terms:
225 + -16x2 + x4 = 0

Solving
225 + -16x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-225' to each side of the equation.
225 + -16x2 + -225 + x4 = 0 + -225

Reorder the terms:
225 + -225 + -16x2 + x4 = 0 + -225

Combine like terms: 225 + -225 = 0
0 + -16x2 + x4 = 0 + -225
-16x2 + x4 = 0 + -225

Combine like terms: 0 + -225 = -225
-16x2 + x4 = -225

The x term is -16x2.  Take half its coefficient (-8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
-16x2 + 64 + x4 = -225 + 64

Reorder the terms:
64 + -16x2 + x4 = -225 + 64

Combine like terms: -225 + 64 = -161
64 + -16x2 + x4 = -161

Factor a perfect square on the left side:
(x2 + -8)(x2 + -8) = -161

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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