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Simplifying 0 = 4r2 + -28 + 49 Reorder the terms: 0 = -28 + 49 + 4r2 Combine like terms: -28 + 49 = 21 0 = 21 + 4r2 Solving 0 = 21 + 4r2 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4r2' to each side of the equation. 0 + -4r2 = 21 + 4r2 + -4r2 Remove the zero: -4r2 = 21 + 4r2 + -4r2 Combine like terms: 4r2 + -4r2 = 0 -4r2 = 21 + 0 -4r2 = 21 Divide each side by '-4'. r2 = -5.25 Simplifying r2 = -5.25 Reorder the terms: 5.25 + r2 = -5.25 + 5.25 Combine like terms: -5.25 + 5.25 = 0.00 5.25 + r2 = 0.00 The solution to this equation could not be determined.
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