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Simplifying 7z(z + 4) = 7z2 + 28z + -6 Reorder the terms: 7z(4 + z) = 7z2 + 28z + -6 (4 * 7z + z * 7z) = 7z2 + 28z + -6 (28z + 7z2) = 7z2 + 28z + -6 Reorder the terms: 28z + 7z2 = -6 + 28z + 7z2 Add '-28z' to each side of the equation. 28z + -28z + 7z2 = -6 + 28z + -28z + 7z2 Combine like terms: 28z + -28z = 0 0 + 7z2 = -6 + 28z + -28z + 7z2 7z2 = -6 + 28z + -28z + 7z2 Combine like terms: 28z + -28z = 0 7z2 = -6 + 0 + 7z2 7z2 = -6 + 7z2 Add '-7z2' to each side of the equation. 7z2 + -7z2 = -6 + 7z2 + -7z2 Combine like terms: 7z2 + -7z2 = 0 0 = -6 + 7z2 + -7z2 Combine like terms: 7z2 + -7z2 = 0 0 = -6 + 0 0 = -6 Solving 0 = -6 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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