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Simplifying (5z4)(4z5) = 0 Remove parenthesis around (5z4) 5z4(4z5) = 0 Remove parenthesis around (4z5) 5z4 * 4z5 = 0 Reorder the terms for easier multiplication: 5 * 4z4 * z5 = 0 Multiply 5 * 4 20z4 * z5 = 0 Multiply z4 * z5 20z9 = 0 Solving 20z9 = 0 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Divide each side by '20'. z9 = 0.0 Simplifying z9 = 0.0 The solution to this equation could not be determined.
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