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Simplifying (7x + -9)(4x + 5) = 0 Reorder the terms: (-9 + 7x)(4x + 5) = 0 Reorder the terms: (-9 + 7x)(5 + 4x) = 0 Multiply (-9 + 7x) * (5 + 4x) (-9(5 + 4x) + 7x * (5 + 4x)) = 0 ((5 * -9 + 4x * -9) + 7x * (5 + 4x)) = 0 ((-45 + -36x) + 7x * (5 + 4x)) = 0 (-45 + -36x + (5 * 7x + 4x * 7x)) = 0 (-45 + -36x + (35x + 28x2)) = 0 Combine like terms: -36x + 35x = -1x (-45 + -1x + 28x2) = 0 Solving -45 + -1x + 28x2 = 0 Solving for variable 'x'. Factor a trinomial. (-5 + -4x)(9 + -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 '(9 + -7x)' equal to zero and attempt to solve: Simplifying 9 + -7x = 0 Solving 9 + -7x = 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 + -7x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -7x = 0 + -9 -7x = 0 + -9 Combine like terms: 0 + -9 = -9 -7x = -9 Divide each side by '-7'. x = 1.285714286 Simplifying x = 1.285714286Solution
x = {-1.25, 1.285714286}
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