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Simplifying (7x + -1)(4x + 5) = 0 Reorder the terms: (-1 + 7x)(4x + 5) = 0 Reorder the terms: (-1 + 7x)(5 + 4x) = 0 Multiply (-1 + 7x) * (5 + 4x) (-1(5 + 4x) + 7x * (5 + 4x)) = 0 ((5 * -1 + 4x * -1) + 7x * (5 + 4x)) = 0 ((-5 + -4x) + 7x * (5 + 4x)) = 0 (-5 + -4x + (5 * 7x + 4x * 7x)) = 0 (-5 + -4x + (35x + 28x2)) = 0 Combine like terms: -4x + 35x = 31x (-5 + 31x + 28x2) = 0 Solving -5 + 31x + 28x2 = 0 Solving for variable 'x'. Factor a trinomial. (-5 + -4x)(1 + -7x) = 0Subproblem 1
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 = -1.25Subproblem 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 = {-1.25, 0.1428571429}
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