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Simplifying (4r + -9)(4r + -9) = product Reorder the terms: (-9 + 4r)(4r + -9) = product Reorder the terms: (-9 + 4r)(-9 + 4r) = product Multiply (-9 + 4r) * (-9 + 4r) (-9(-9 + 4r) + 4r * (-9 + 4r)) = product ((-9 * -9 + 4r * -9) + 4r * (-9 + 4r)) = product ((81 + -36r) + 4r * (-9 + 4r)) = product (81 + -36r + (-9 * 4r + 4r * 4r)) = product (81 + -36r + (-36r + 16r2)) = product Combine like terms: -36r + -36r = -72r (81 + -72r + 16r2) = product Solving 81 + -72r + 16r2 = cdoprtu Solving for variable 'r'. Reorder the terms: 81 + -1cdoprtu + -72r + 16r2 = cdoprtu + -1cdoprtu Combine like terms: cdoprtu + -1cdoprtu = 0 81 + -1cdoprtu + -72r + 16r2 = 0 The solution to this equation could not be determined.
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