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Simplifying 5z(z + 3) = 5z2 + 15z + -7 Reorder the terms: 5z(3 + z) = 5z2 + 15z + -7 (3 * 5z + z * 5z) = 5z2 + 15z + -7 (15z + 5z2) = 5z2 + 15z + -7 Reorder the terms: 15z + 5z2 = -7 + 15z + 5z2 Add '-15z' to each side of the equation. 15z + -15z + 5z2 = -7 + 15z + -15z + 5z2 Combine like terms: 15z + -15z = 0 0 + 5z2 = -7 + 15z + -15z + 5z2 5z2 = -7 + 15z + -15z + 5z2 Combine like terms: 15z + -15z = 0 5z2 = -7 + 0 + 5z2 5z2 = -7 + 5z2 Add '-5z2' to each side of the equation. 5z2 + -5z2 = -7 + 5z2 + -5z2 Combine like terms: 5z2 + -5z2 = 0 0 = -7 + 5z2 + -5z2 Combine like terms: 5z2 + -5z2 = 0 0 = -7 + 0 0 = -7 Solving 0 = -7 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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