(x^2-21)(x^2+6x+13)=0

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Solution for (x^2-21)(x^2+6x+13)=0 equation: 


Simplifying
(x2 + -21)(x2 + 6x + 13) = 0

Reorder the terms:
(-21 + x2)(x2 + 6x + 13) = 0

Reorder the terms:
(-21 + x2)(13 + 6x + x2) = 0

Multiply (-21 + x2) * (13 + 6x + x2)
(-21(13 + 6x + x2) + x2(13 + 6x + x2)) = 0
((13 * -21 + 6x * -21 + x2 * -21) + x2(13 + 6x + x2)) = 0
((-273 + -126x + -21x2) + x2(13 + 6x + x2)) = 0
(-273 + -126x + -21x2 + (13 * x2 + 6x * x2 + x2 * x2)) = 0
(-273 + -126x + -21x2 + (13x2 + 6x3 + x4)) = 0

Combine like terms: -21x2 + 13x2 = -8x2
(-273 + -126x + -8x2 + 6x3 + x4) = 0

Solving
-273 + -126x + -8x2 + 6x3 + x4 = 0

Solving for variable 'x'.

The solution to this equation could not be determined.

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