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Simplifying 3z(z + 5) = 3z2 + 15z + -9 Reorder the terms: 3z(5 + z) = 3z2 + 15z + -9 (5 * 3z + z * 3z) = 3z2 + 15z + -9 (15z + 3z2) = 3z2 + 15z + -9 Reorder the terms: 15z + 3z2 = -9 + 15z + 3z2 Add '-15z' to each side of the equation. 15z + -15z + 3z2 = -9 + 15z + -15z + 3z2 Combine like terms: 15z + -15z = 0 0 + 3z2 = -9 + 15z + -15z + 3z2 3z2 = -9 + 15z + -15z + 3z2 Combine like terms: 15z + -15z = 0 3z2 = -9 + 0 + 3z2 3z2 = -9 + 3z2 Add '-3z2' to each side of the equation. 3z2 + -3z2 = -9 + 3z2 + -3z2 Combine like terms: 3z2 + -3z2 = 0 0 = -9 + 3z2 + -3z2 Combine like terms: 3z2 + -3z2 = 0 0 = -9 + 0 0 = -9 Solving 0 = -9 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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