2z^4-13z^2+36=0

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Solution for 2z^4-13z^2+36=0 equation:


Simplifying
2z4 + -13z2 + 36 = 0

Reorder the terms:
36 + -13z2 + 2z4 = 0

Solving
36 + -13z2 + 2z4 = 0

Solving for variable 'z'.

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
18 + -6.5z2 + z4 = 0

Move the constant term to the right:

Add '-18' to each side of the equation.
18 + -6.5z2 + -18 + z4 = 0 + -18

Reorder the terms:
18 + -18 + -6.5z2 + z4 = 0 + -18

Combine like terms: 18 + -18 = 0
0 + -6.5z2 + z4 = 0 + -18
-6.5z2 + z4 = 0 + -18

Combine like terms: 0 + -18 = -18
-6.5z2 + z4 = -18

The z term is -6.5z2.  Take half its coefficient (-3.25).
Square it (10.5625) and add it to both sides.

Add '10.5625' to each side of the equation.
-6.5z2 + 10.5625 + z4 = -18 + 10.5625

Reorder the terms:
10.5625 + -6.5z2 + z4 = -18 + 10.5625

Combine like terms: -18 + 10.5625 = -7.4375
10.5625 + -6.5z2 + z4 = -7.4375

Factor a perfect square on the left side:
(z2 + -3.25)(z2 + -3.25) = -7.4375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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