9x+4=(x-5)(9x+4)

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Solution for 9x+4=(x-5)(9x+4) equation:


Simplifying
9x + 4 = (x + -5)(9x + 4)

Reorder the terms:
4 + 9x = (x + -5)(9x + 4)

Reorder the terms:
4 + 9x = (-5 + x)(9x + 4)

Reorder the terms:
4 + 9x = (-5 + x)(4 + 9x)

Multiply (-5 + x) * (4 + 9x)
4 + 9x = (-5(4 + 9x) + x(4 + 9x))
4 + 9x = ((4 * -5 + 9x * -5) + x(4 + 9x))
4 + 9x = ((-20 + -45x) + x(4 + 9x))
4 + 9x = (-20 + -45x + (4 * x + 9x * x))
4 + 9x = (-20 + -45x + (4x + 9x2))

Combine like terms: -45x + 4x = -41x
4 + 9x = (-20 + -41x + 9x2)

Solving
4 + 9x = -20 + -41x + 9x2

Solving for variable 'x'.

Reorder the terms:
4 + 20 + 9x + 41x + -9x2 = -20 + -41x + 9x2 + 20 + 41x + -9x2

Combine like terms: 4 + 20 = 24
24 + 9x + 41x + -9x2 = -20 + -41x + 9x2 + 20 + 41x + -9x2

Combine like terms: 9x + 41x = 50x
24 + 50x + -9x2 = -20 + -41x + 9x2 + 20 + 41x + -9x2

Reorder the terms:
24 + 50x + -9x2 = -20 + 20 + -41x + 41x + 9x2 + -9x2

Combine like terms: -20 + 20 = 0
24 + 50x + -9x2 = 0 + -41x + 41x + 9x2 + -9x2
24 + 50x + -9x2 = -41x + 41x + 9x2 + -9x2

Combine like terms: -41x + 41x = 0
24 + 50x + -9x2 = 0 + 9x2 + -9x2
24 + 50x + -9x2 = 9x2 + -9x2

Combine like terms: 9x2 + -9x2 = 0
24 + 50x + -9x2 = 0

Factor a trinomial.
(6 + -1x)(4 + 9x) = 0

Subproblem 1

Set the factor '(6 + -1x)' equal to zero and attempt to solve: Simplifying 6 + -1x = 0 Solving 6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -1x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -1x = 0 + -6 -1x = 0 + -6 Combine like terms: 0 + -6 = -6 -1x = -6 Divide each side by '-1'. x = 6 Simplifying x = 6

Subproblem 2

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

Solution

x = {6, -0.4444444444}

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