(2a+9)(5a-1)=0

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Solution for (2a+9)(5a-1)=0 equation:


Simplifying
(2a + 9)(5a + -1) = 0

Reorder the terms:
(9 + 2a)(5a + -1) = 0

Reorder the terms:
(9 + 2a)(-1 + 5a) = 0

Multiply (9 + 2a) * (-1 + 5a)
(9(-1 + 5a) + 2a * (-1 + 5a)) = 0
((-1 * 9 + 5a * 9) + 2a * (-1 + 5a)) = 0
((-9 + 45a) + 2a * (-1 + 5a)) = 0
(-9 + 45a + (-1 * 2a + 5a * 2a)) = 0
(-9 + 45a + (-2a + 10a2)) = 0

Combine like terms: 45a + -2a = 43a
(-9 + 43a + 10a2) = 0

Solving
-9 + 43a + 10a2 = 0

Solving for variable 'a'.

Factor a trinomial.
(-9 + -2a)(1 + -5a) = 0

Subproblem 1

Set the factor '(-9 + -2a)' equal to zero and attempt to solve: Simplifying -9 + -2a = 0 Solving -9 + -2a = 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 + -2a = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -2a = 0 + 9 -2a = 0 + 9 Combine like terms: 0 + 9 = 9 -2a = 9 Divide each side by '-2'. a = -4.5 Simplifying a = -4.5

Subproblem 2

Set the factor '(1 + -5a)' equal to zero and attempt to solve: Simplifying 1 + -5a = 0 Solving 1 + -5a = 0 Move all terms containing a to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -5a = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -5a = 0 + -1 -5a = 0 + -1 Combine like terms: 0 + -1 = -1 -5a = -1 Divide each side by '-5'. a = 0.2 Simplifying a = 0.2

Solution

a = {-4.5, 0.2}

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