(a-9)(a-4)=

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Solution for (a-9)(a-4)= equation:


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

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

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

Multiply (-9 + a) * (-4 + a)
(-9(-4 + a) + a(-4 + a)) = 0
((-4 * -9 + a * -9) + a(-4 + a)) = 0
((36 + -9a) + a(-4 + a)) = 0
(36 + -9a + (-4 * a + a * a)) = 0
(36 + -9a + (-4a + a2)) = 0

Combine like terms: -9a + -4a = -13a
(36 + -13a + a2) = 0

Solving
36 + -13a + a2 = 0

Solving for variable 'a'.

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

Subproblem 1

Set the factor '(4 + -1a)' equal to zero and attempt to solve: Simplifying 4 + -1a = 0 Solving 4 + -1a = 0 Move all terms containing a to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1a = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1a = 0 + -4 -1a = 0 + -4 Combine like terms: 0 + -4 = -4 -1a = -4 Divide each side by '-1'. a = 4 Simplifying a = 4

Subproblem 2

Set the factor '(9 + -1a)' equal to zero and attempt to solve: Simplifying 9 + -1a = 0 Solving 9 + -1a = 0 Move all terms containing a to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1a = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1a = 0 + -9 -1a = 0 + -9 Combine like terms: 0 + -9 = -9 -1a = -9 Divide each side by '-1'. a = 9 Simplifying a = 9

Solution

a = {4, 9}

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