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Simplifying 2z(z + 4) = 2z2 + 8z + -8 Reorder the terms: 2z(4 + z) = 2z2 + 8z + -8 (4 * 2z + z * 2z) = 2z2 + 8z + -8 (8z + 2z2) = 2z2 + 8z + -8 Reorder the terms: 8z + 2z2 = -8 + 8z + 2z2 Add '-8z' to each side of the equation. 8z + -8z + 2z2 = -8 + 8z + -8z + 2z2 Combine like terms: 8z + -8z = 0 0 + 2z2 = -8 + 8z + -8z + 2z2 2z2 = -8 + 8z + -8z + 2z2 Combine like terms: 8z + -8z = 0 2z2 = -8 + 0 + 2z2 2z2 = -8 + 2z2 Add '-2z2' to each side of the equation. 2z2 + -2z2 = -8 + 2z2 + -2z2 Combine like terms: 2z2 + -2z2 = 0 0 = -8 + 2z2 + -2z2 Combine like terms: 2z2 + -2z2 = 0 0 = -8 + 0 0 = -8 Solving 0 = -8 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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