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Simplifying 4c(-7c) = 9 Remove parenthesis around (-7c) 4c * -7c = 9 Reorder the terms for easier multiplication: 4 * -7c * c = 9 Multiply 4 * -7 -28c * c = 9 Multiply c * c -28c2 = 9 Solving -28c2 = 9 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '-28'. c2 = -0.3214285714 Simplifying c2 = -0.3214285714 Reorder the terms: 0.3214285714 + c2 = -0.3214285714 + 0.3214285714 Combine like terms: -0.3214285714 + 0.3214285714 = 0.0000000000 0.3214285714 + c2 = 0.0000000000 The solution to this equation could not be determined.
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