(9x+4)(x-4)=0

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Solution for (9x+4)(x-4)=0 equation:


Simplifying
(9x + 4)(x + -4) = 0

Reorder the terms:
(4 + 9x)(x + -4) = 0

Reorder the terms:
(4 + 9x)(-4 + x) = 0

Multiply (4 + 9x) * (-4 + x)
(4(-4 + x) + 9x * (-4 + x)) = 0
((-4 * 4 + x * 4) + 9x * (-4 + x)) = 0
((-16 + 4x) + 9x * (-4 + x)) = 0
(-16 + 4x + (-4 * 9x + x * 9x)) = 0
(-16 + 4x + (-36x + 9x2)) = 0

Combine like terms: 4x + -36x = -32x
(-16 + -32x + 9x2) = 0

Solving
-16 + -32x + 9x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-4 + -9x)(4 + -1x) = 0

Subproblem 1

Set the factor '(-4 + -9x)' equal to zero and attempt to solve: Simplifying -4 + -9x = 0 Solving -4 + -9x = 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 + -9x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -9x = 0 + 4 -9x = 0 + 4 Combine like terms: 0 + 4 = 4 -9x = 4 Divide each side by '-9'. x = -0.4444444444 Simplifying x = -0.4444444444

Subproblem 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 = 4

Solution

x = {-0.4444444444, 4}

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