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Simplifying 21x2 + 11x + -4 = -2 Reorder the terms: -4 + 11x + 21x2 = -2 Solving -4 + 11x + 21x2 = -2 Solving for variable 'x'. Reorder the terms: -4 + 2 + 11x + 21x2 = -2 + 2 Combine like terms: -4 + 2 = -2 -2 + 11x + 21x2 = -2 + 2 Combine like terms: -2 + 2 = 0 -2 + 11x + 21x2 = 0 Factor a trinomial. (-2 + -3x)(1 + -7x) = 0Subproblem 1
Set the factor '(-2 + -3x)' equal to zero and attempt to solve: Simplifying -2 + -3x = 0 Solving -2 + -3x = 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 + -3x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -3x = 0 + 2 -3x = 0 + 2 Combine like terms: 0 + 2 = 2 -3x = 2 Divide each side by '-3'. x = -0.6666666667 Simplifying x = -0.6666666667Subproblem 2
Set the factor '(1 + -7x)' equal to zero and attempt to solve: Simplifying 1 + -7x = 0 Solving 1 + -7x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -7x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -7x = 0 + -1 -7x = 0 + -1 Combine like terms: 0 + -1 = -1 -7x = -1 Divide each side by '-7'. x = 0.1428571429 Simplifying x = 0.1428571429Solution
x = {-0.6666666667, 0.1428571429}
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