28r^2+88r+64=0

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Solution for 28r^2+88r+64=0 equation:


Simplifying
28r2 + 88r + 64 = 0

Reorder the terms:
64 + 88r + 28r2 = 0

Solving
64 + 88r + 28r2 = 0

Solving for variable 'r'.

Factor out the Greatest Common Factor (GCF), '4'.
4(16 + 22r + 7r2) = 0

Factor a trinomial.
4((2 + r)(8 + 7r)) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(2 + r)' equal to zero and attempt to solve: Simplifying 2 + r = 0 Solving 2 + r = 0 Move all terms containing r to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + r = 0 + -2 Combine like terms: 2 + -2 = 0 0 + r = 0 + -2 r = 0 + -2 Combine like terms: 0 + -2 = -2 r = -2 Simplifying r = -2

Subproblem 2

Set the factor '(8 + 7r)' equal to zero and attempt to solve: Simplifying 8 + 7r = 0 Solving 8 + 7r = 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 + 7r = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 7r = 0 + -8 7r = 0 + -8 Combine like terms: 0 + -8 = -8 7r = -8 Divide each side by '7'. r = -1.142857143 Simplifying r = -1.142857143

Solution

r = {-2, -1.142857143}

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