25r^2+80r+64=0

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Solution for 25r^2+80r+64=0 equation:


Simplifying
25r2 + 80r + 64 = 0

Reorder the terms:
64 + 80r + 25r2 = 0

Solving
64 + 80r + 25r2 = 0

Solving for variable 'r'.

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

Subproblem 1

Set the factor '(8 + 5r)' equal to zero and attempt to solve: Simplifying 8 + 5r = 0 Solving 8 + 5r = 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 + 5r = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 5r = 0 + -8 5r = 0 + -8 Combine like terms: 0 + -8 = -8 5r = -8 Divide each side by '5'. r = -1.6 Simplifying r = -1.6

Subproblem 2

Set the factor '(8 + 5r)' equal to zero and attempt to solve: Simplifying 8 + 5r = 0 Solving 8 + 5r = 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 + 5r = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 5r = 0 + -8 5r = 0 + -8 Combine like terms: 0 + -8 = -8 5r = -8 Divide each side by '5'. r = -1.6 Simplifying r = -1.6

Solution

r = {-1.6, -1.6}

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