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Simplifying (9x + -1)(5x + 4) = 0 Reorder the terms: (-1 + 9x)(5x + 4) = 0 Reorder the terms: (-1 + 9x)(4 + 5x) = 0 Multiply (-1 + 9x) * (4 + 5x) (-1(4 + 5x) + 9x * (4 + 5x)) = 0 ((4 * -1 + 5x * -1) + 9x * (4 + 5x)) = 0 ((-4 + -5x) + 9x * (4 + 5x)) = 0 (-4 + -5x + (4 * 9x + 5x * 9x)) = 0 (-4 + -5x + (36x + 45x2)) = 0 Combine like terms: -5x + 36x = 31x (-4 + 31x + 45x2) = 0 Solving -4 + 31x + 45x2 = 0 Solving for variable 'x'. Factor a trinomial. (-4 + -5x)(1 + -9x) = 0Subproblem 1
Set the factor '(-4 + -5x)' equal to zero and attempt to solve: Simplifying -4 + -5x = 0 Solving -4 + -5x = 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 + -5x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -5x = 0 + 4 -5x = 0 + 4 Combine like terms: 0 + 4 = 4 -5x = 4 Divide each side by '-5'. x = -0.8 Simplifying x = -0.8Subproblem 2
Set the factor '(1 + -9x)' equal to zero and attempt to solve: Simplifying 1 + -9x = 0 Solving 1 + -9x = 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 + -9x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -9x = 0 + -1 -9x = 0 + -1 Combine like terms: 0 + -1 = -1 -9x = -1 Divide each side by '-9'. x = 0.1111111111 Simplifying x = 0.1111111111Solution
x = {-0.8, 0.1111111111}
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