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Simplifying 21x2 + -79x + -20 = 0 Reorder the terms: -20 + -79x + 21x2 = 0 Solving -20 + -79x + 21x2 = 0 Solving for variable 'x'. Factor a trinomial. (-5 + -21x)(4 + -1x) = 0Subproblem 1
Set the factor '(-5 + -21x)' equal to zero and attempt to solve: Simplifying -5 + -21x = 0 Solving -5 + -21x = 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 + -21x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -21x = 0 + 5 -21x = 0 + 5 Combine like terms: 0 + 5 = 5 -21x = 5 Divide each side by '-21'. x = -0.2380952381 Simplifying x = -0.2380952381Subproblem 2
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 = 4Solution
x = {-0.2380952381, 4}
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