7r^3+35r^2-42r=0

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Solution for 7r^3+35r^2-42r=0 equation:


Simplifying
7r3 + 35r2 + -42r = 0

Reorder the terms:
-42r + 35r2 + 7r3 = 0

Solving
-42r + 35r2 + 7r3 = 0

Solving for variable 'r'.

Factor out the Greatest Common Factor (GCF), '7r'.
7r(-6 + 5r + r2) = 0

Factor a trinomial.
7r((-6 + -1r)(1 + -1r)) = 0

Ignore the factor 7.

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 '(-6 + -1r)' equal to zero and attempt to solve: Simplifying -6 + -1r = 0 Solving -6 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + -1r = 0 + 6 Combine like terms: -6 + 6 = 0 0 + -1r = 0 + 6 -1r = 0 + 6 Combine like terms: 0 + 6 = 6 -1r = 6 Divide each side by '-1'. r = -6 Simplifying r = -6

Subproblem 3

Set the factor '(1 + -1r)' equal to zero and attempt to solve: Simplifying 1 + -1r = 0 Solving 1 + -1r = 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 + -1r = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1r = 0 + -1 -1r = 0 + -1 Combine like terms: 0 + -1 = -1 -1r = -1 Divide each side by '-1'. r = 1 Simplifying r = 1

Solution

r = {0, -6, 1}

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