7r^4-448=0

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Solution for 7r^4-448=0 equation:


Simplifying
7r4 + -448 = 0

Reorder the terms:
-448 + 7r4 = 0

Solving
-448 + 7r4 = 0

Solving for variable 'r'.

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

Add '448' to each side of the equation.
-448 + 448 + 7r4 = 0 + 448

Combine like terms: -448 + 448 = 0
0 + 7r4 = 0 + 448
7r4 = 0 + 448

Combine like terms: 0 + 448 = 448
7r4 = 448

Divide each side by '7'.
r4 = 64

Simplifying
r4 = 64

Reorder the terms:
-64 + r4 = 64 + -64

Combine like terms: 64 + -64 = 0
-64 + r4 = 0

Factor a difference between two squares.
(8 + r2)(-8 + r2) = 0

Subproblem 1

Set the factor '(8 + r2)' equal to zero and attempt to solve: Simplifying 8 + r2 = 0 Solving 8 + r2 = 0 Move all terms containing r to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + r2 = 0 + -8 Combine like terms: 8 + -8 = 0 0 + r2 = 0 + -8 r2 = 0 + -8 Combine like terms: 0 + -8 = -8 r2 = -8 Simplifying r2 = -8 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 '(-8 + r2)' equal to zero and attempt to solve: Simplifying -8 + r2 = 0 Solving -8 + r2 = 0 Move all terms containing r to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + r2 = 0 + 8 Combine like terms: -8 + 8 = 0 0 + r2 = 0 + 8 r2 = 0 + 8 Combine like terms: 0 + 8 = 8 r2 = 8 Simplifying r2 = 8 Take the square root of each side: r = {-2.828427125, 2.828427125}

Solution

r = {-2.828427125, 2.828427125}

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