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Simplifying 0 = 4x2 + -41x + 45 Reorder the terms: 0 = 45 + -41x + 4x2 Solving 0 = 45 + -41x + 4x2 Solving for variable 'x'. Combine like terms: 0 + -45 = -45 -45 + 41x + -4x2 = 45 + -41x + 4x2 + -45 + 41x + -4x2 Reorder the terms: -45 + 41x + -4x2 = 45 + -45 + -41x + 41x + 4x2 + -4x2 Combine like terms: 45 + -45 = 0 -45 + 41x + -4x2 = 0 + -41x + 41x + 4x2 + -4x2 -45 + 41x + -4x2 = -41x + 41x + 4x2 + -4x2 Combine like terms: -41x + 41x = 0 -45 + 41x + -4x2 = 0 + 4x2 + -4x2 -45 + 41x + -4x2 = 4x2 + -4x2 Combine like terms: 4x2 + -4x2 = 0 -45 + 41x + -4x2 = 0 Factor a trinomial. (-9 + x)(5 + -4x) = 0Subproblem 1
Set the factor '(-9 + x)' equal to zero and attempt to solve: Simplifying -9 + x = 0 Solving -9 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + x = 0 + 9 x = 0 + 9 Combine like terms: 0 + 9 = 9 x = 9 Simplifying x = 9Subproblem 2
Set the factor '(5 + -4x)' equal to zero and attempt to solve: Simplifying 5 + -4x = 0 Solving 5 + -4x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -4x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -4x = 0 + -5 -4x = 0 + -5 Combine like terms: 0 + -5 = -5 -4x = -5 Divide each side by '-4'. x = 1.25 Simplifying x = 1.25Solution
x = {9, 1.25}
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