(5x+5)(x-9)=0

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Solution for (5x+5)(x-9)=0 equation:


Simplifying
(5x + 5)(x + -9) = 0

Reorder the terms:
(5 + 5x)(x + -9) = 0

Reorder the terms:
(5 + 5x)(-9 + x) = 0

Multiply (5 + 5x) * (-9 + x)
(5(-9 + x) + 5x * (-9 + x)) = 0
((-9 * 5 + x * 5) + 5x * (-9 + x)) = 0
((-45 + 5x) + 5x * (-9 + x)) = 0
(-45 + 5x + (-9 * 5x + x * 5x)) = 0
(-45 + 5x + (-45x + 5x2)) = 0

Combine like terms: 5x + -45x = -40x
(-45 + -40x + 5x2) = 0

Solving
-45 + -40x + 5x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '5'.
5(-9 + -8x + x2) = 0

Factor a trinomial.
5((-1 + -1x)(9 + -1x)) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(-1 + -1x)' equal to zero and attempt to solve: Simplifying -1 + -1x = 0 Solving -1 + -1x = 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 + -1x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1x = 0 + 1 -1x = 0 + 1 Combine like terms: 0 + 1 = 1 -1x = 1 Divide each side by '-1'. x = -1 Simplifying x = -1

Subproblem 2

Set the factor '(9 + -1x)' equal to zero and attempt to solve: Simplifying 9 + -1x = 0 Solving 9 + -1x = 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 + -1x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1x = 0 + -9 -1x = 0 + -9 Combine like terms: 0 + -9 = -9 -1x = -9 Divide each side by '-1'. x = 9 Simplifying x = 9

Solution

x = {-1, 9}

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