w^4+7w^2-18=0

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Solution for w^4+7w^2-18=0 equation:


Simplifying
w4 + 7w2 + -18 = 0

Reorder the terms:
-18 + 7w2 + w4 = 0

Solving
-18 + 7w2 + w4 = 0

Solving for variable 'w'.

Factor a trinomial.
(-9 + -1w2)(2 + -1w2) = 0

Subproblem 1

Set the factor '(-9 + -1w2)' equal to zero and attempt to solve: Simplifying -9 + -1w2 = 0 Solving -9 + -1w2 = 0 Move all terms containing w to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -1w2 = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -1w2 = 0 + 9 -1w2 = 0 + 9 Combine like terms: 0 + 9 = 9 -1w2 = 9 Divide each side by '-1'. w2 = -9 Simplifying w2 = -9 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 '(2 + -1w2)' equal to zero and attempt to solve: Simplifying 2 + -1w2 = 0 Solving 2 + -1w2 = 0 Move all terms containing w to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1w2 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1w2 = 0 + -2 -1w2 = 0 + -2 Combine like terms: 0 + -2 = -2 -1w2 = -2 Divide each side by '-1'. w2 = 2 Simplifying w2 = 2 Take the square root of each side: w = {-1.414213562, 1.414213562}

Solution

w = {-1.414213562, 1.414213562}

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