(A-5)(9a^2-a-4)=

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Solution for (A-5)(9a^2-a-4)= equation: 


Simplifying
(A + -5)(9a2 + -1a + -4) = 0

Reorder the terms:
(-5 + A)(9a2 + -1a + -4) = 0

Reorder the terms:
(-5 + A)(-4 + -1a + 9a2) = 0

Multiply (-5 + A) * (-4 + -1a + 9a2)
(-5(-4 + -1a + 9a2) + A(-4 + -1a + 9a2)) = 0
((-4 * -5 + -1a * -5 + 9a2 * -5) + A(-4 + -1a + 9a2)) = 0
((20 + 5a + -45a2) + A(-4 + -1a + 9a2)) = 0
(20 + 5a + -45a2 + (-4 * A + -1a * A + 9a2 * A)) = 0
(20 + 5a + -45a2 + (-4A + -1aA + 9a2A)) = 0

Reorder the terms:
(20 + -4A + 5a + -1aA + -45a2 + 9a2A) = 0
(20 + -4A + 5a + -1aA + -45a2 + 9a2A) = 0

Solving
20 + -4A + 5a + -1aA + -45a2 + 9a2A = 0

Solving for variable 'A'.

Move all terms containing A to the left, all other terms to the right.

Add '-20' to each side of the equation.
20 + -4A + 5a + -1aA + -45a2 + -20 + 9a2A = 0 + -20

Reorder the terms:
20 + -20 + -4A + 5a + -1aA + -45a2 + 9a2A = 0 + -20

Combine like terms: 20 + -20 = 0
0 + -4A + 5a + -1aA + -45a2 + 9a2A = 0 + -20
-4A + 5a + -1aA + -45a2 + 9a2A = 0 + -20

Combine like terms: 0 + -20 = -20
-4A + 5a + -1aA + -45a2 + 9a2A = -20

Add '-5a' to each side of the equation.
-4A + 5a + -1aA + -45a2 + -5a + 9a2A = -20 + -5a

Reorder the terms:
-4A + 5a + -5a + -1aA + -45a2 + 9a2A = -20 + -5a

Combine like terms: 5a + -5a = 0
-4A + 0 + -1aA + -45a2 + 9a2A = -20 + -5a
-4A + -1aA + -45a2 + 9a2A = -20 + -5a

Add '45a2' to each side of the equation.
-4A + -1aA + -45a2 + 45a2 + 9a2A = -20 + -5a + 45a2

Combine like terms: -45a2 + 45a2 = 0
-4A + -1aA + 0 + 9a2A = -20 + -5a + 45a2
-4A + -1aA + 9a2A = -20 + -5a + 45a2

Reorder the terms:
20 + -4A + 5a + -1aA + -45a2 + 9a2A = -20 + -5a + 45a2 + 20 + 5a + -45a2

Reorder the terms:
20 + -4A + 5a + -1aA + -45a2 + 9a2A = -20 + 20 + -5a + 5a + 45a2 + -45a2

Combine like terms: -20 + 20 = 0
20 + -4A + 5a + -1aA + -45a2 + 9a2A = 0 + -5a + 5a + 45a2 + -45a2
20 + -4A + 5a + -1aA + -45a2 + 9a2A = -5a + 5a + 45a2 + -45a2

Combine like terms: -5a + 5a = 0
20 + -4A + 5a + -1aA + -45a2 + 9a2A = 0 + 45a2 + -45a2
20 + -4A + 5a + -1aA + -45a2 + 9a2A = 45a2 + -45a2

Combine like terms: 45a2 + -45a2 = 0
20 + -4A + 5a + -1aA + -45a2 + 9a2A = 0

The solution to this equation could not be determined.

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