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Simplifying x = -2x2 + 28 Reorder the terms: x = 28 + -2x2 Solving x = 28 + -2x2 Solving for variable 'x'. Reorder the terms: -28 + x + 2x2 = 28 + -2x2 + -28 + 2x2 Reorder the terms: -28 + x + 2x2 = 28 + -28 + -2x2 + 2x2 Combine like terms: 28 + -28 = 0 -28 + x + 2x2 = 0 + -2x2 + 2x2 -28 + x + 2x2 = -2x2 + 2x2 Combine like terms: -2x2 + 2x2 = 0 -28 + x + 2x2 = 0 Factor a trinomial. (-4 + -1x)(7 + -2x) = 0Subproblem 1
Set the factor '(-4 + -1x)' equal to zero and attempt to solve: Simplifying -4 + -1x = 0 Solving -4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1x = 0 + 4 -1x = 0 + 4 Combine like terms: 0 + 4 = 4 -1x = 4 Divide each side by '-1'. x = -4 Simplifying x = -4Subproblem 2
Set the factor '(7 + -2x)' equal to zero and attempt to solve: Simplifying 7 + -2x = 0 Solving 7 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -2x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -2x = 0 + -7 -2x = 0 + -7 Combine like terms: 0 + -7 = -7 -2x = -7 Divide each side by '-2'. x = 3.5 Simplifying x = 3.5Solution
x = {-4, 3.5}
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