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Simplifying 0 = 5x2 + 4x + -28 Reorder the terms: 0 = -28 + 4x + 5x2 Solving 0 = -28 + 4x + 5x2 Solving for variable 'x'. Combine like terms: 0 + 28 = 28 28 + -4x + -5x2 = -28 + 4x + 5x2 + 28 + -4x + -5x2 Reorder the terms: 28 + -4x + -5x2 = -28 + 28 + 4x + -4x + 5x2 + -5x2 Combine like terms: -28 + 28 = 0 28 + -4x + -5x2 = 0 + 4x + -4x + 5x2 + -5x2 28 + -4x + -5x2 = 4x + -4x + 5x2 + -5x2 Combine like terms: 4x + -4x = 0 28 + -4x + -5x2 = 0 + 5x2 + -5x2 28 + -4x + -5x2 = 5x2 + -5x2 Combine like terms: 5x2 + -5x2 = 0 28 + -4x + -5x2 = 0 Factor a trinomial. (2 + -1x)(14 + 5x) = 0Subproblem 1
Set the factor '(2 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2Subproblem 2
Set the factor '(14 + 5x)' equal to zero and attempt to solve: Simplifying 14 + 5x = 0 Solving 14 + 5x = 0 Move all terms containing x to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + 5x = 0 + -14 Combine like terms: 14 + -14 = 0 0 + 5x = 0 + -14 5x = 0 + -14 Combine like terms: 0 + -14 = -14 5x = -14 Divide each side by '5'. x = -2.8 Simplifying x = -2.8Solution
x = {2, -2.8}
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