(-7r^7+r^4-2r)-(-5r^7+5r^4)=

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Solution for (-7r^7+r^4-2r)-(-5r^7+5r^4)= equation:


Simplifying
(-7r7 + r4 + -2r) + -1(-5r7 + 5r4) = 0

Reorder the terms:
(-2r + r4 + -7r7) + -1(-5r7 + 5r4) = 0

Remove parenthesis around (-2r + r4 + -7r7)
-2r + r4 + -7r7 + -1(-5r7 + 5r4) = 0

Reorder the terms:
-2r + r4 + -7r7 + -1(5r4 + -5r7) = 0
-2r + r4 + -7r7 + (5r4 * -1 + -5r7 * -1) = 0
-2r + r4 + -7r7 + (-5r4 + 5r7) = 0

Reorder the terms:
-2r + r4 + -5r4 + -7r7 + 5r7 = 0

Combine like terms: r4 + -5r4 = -4r4
-2r + -4r4 + -7r7 + 5r7 = 0

Combine like terms: -7r7 + 5r7 = -2r7
-2r + -4r4 + -2r7 = 0

Solving
-2r + -4r4 + -2r7 = 0

Solving for variable 'r'.

Factor out the Greatest Common Factor (GCF), '-2r'.
-2r(1 + 2r3 + r6) = 0

Factor a trinomial.
-2r((1 + r3)(1 + r3)) = 0

Ignore the factor -2.

Subproblem 1

Set the factor 'r' equal to zero and attempt to solve: Simplifying r = 0 Solving r = 0 Move all terms containing r to the left, all other terms to the right. Simplifying r = 0

Subproblem 2

Set the factor '(1 + r3)' equal to zero and attempt to solve: Simplifying 1 + r3 = 0 Solving 1 + r3 = 0 Move all terms containing r to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + r3 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + r3 = 0 + -1 r3 = 0 + -1 Combine like terms: 0 + -1 = -1 r3 = -1 Simplifying r3 = -1 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 3

Set the factor '(1 + r3)' equal to zero and attempt to solve: Simplifying 1 + r3 = 0 Solving 1 + r3 = 0 Move all terms containing r to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + r3 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + r3 = 0 + -1 r3 = 0 + -1 Combine like terms: 0 + -1 = -1 r3 = -1 Simplifying r3 = -1 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Solution

r = {0}

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