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Simplifying 4z2 + 5z + 3 = 0 Reorder the terms: 3 + 5z + 4z2 = 0 Solving 3 + 5z + 4z2 = 0 Solving for variable 'z'. Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 0.75 + 1.25z + z2 = 0 Move the constant term to the right: Add '-0.75' to each side of the equation. 0.75 + 1.25z + -0.75 + z2 = 0 + -0.75 Reorder the terms: 0.75 + -0.75 + 1.25z + z2 = 0 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + 1.25z + z2 = 0 + -0.75 1.25z + z2 = 0 + -0.75 Combine like terms: 0 + -0.75 = -0.75 1.25z + z2 = -0.75 The z term is 1.25z. Take half its coefficient (0.625). Square it (0.390625) and add it to both sides. Add '0.390625' to each side of the equation. 1.25z + 0.390625 + z2 = -0.75 + 0.390625 Reorder the terms: 0.390625 + 1.25z + z2 = -0.75 + 0.390625 Combine like terms: -0.75 + 0.390625 = -0.359375 0.390625 + 1.25z + z2 = -0.359375 Factor a perfect square on the left side: (z + 0.625)(z + 0.625) = -0.359375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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