64r^2-328r+36=-4

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Solution for 64r^2-328r+36=-4 equation:


Simplifying
64r2 + -328r + 36 = -4

Reorder the terms:
36 + -328r + 64r2 = -4

Solving
36 + -328r + 64r2 = -4

Solving for variable 'r'.

Reorder the terms:
36 + 4 + -328r + 64r2 = -4 + 4

Combine like terms: 36 + 4 = 40
40 + -328r + 64r2 = -4 + 4

Combine like terms: -4 + 4 = 0
40 + -328r + 64r2 = 0

Factor out the Greatest Common Factor (GCF), '8'.
8(5 + -41r + 8r2) = 0

Factor a trinomial.
8((1 + -8r)(5 + -1r)) = 0

Ignore the factor 8.

Subproblem 1

Set the factor '(1 + -8r)' equal to zero and attempt to solve: Simplifying 1 + -8r = 0 Solving 1 + -8r = 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 + -8r = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -8r = 0 + -1 -8r = 0 + -1 Combine like terms: 0 + -1 = -1 -8r = -1 Divide each side by '-8'. r = 0.125 Simplifying r = 0.125

Subproblem 2

Set the factor '(5 + -1r)' equal to zero and attempt to solve: Simplifying 5 + -1r = 0 Solving 5 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1r = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1r = 0 + -5 -1r = 0 + -5 Combine like terms: 0 + -5 = -5 -1r = -5 Divide each side by '-1'. r = 5 Simplifying r = 5

Solution

r = {0.125, 5}

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