(2a+5)(a+9)=

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


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

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

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

Multiply (5 + 2a) * (9 + a)
(5(9 + a) + 2a * (9 + a)) = 0
((9 * 5 + a * 5) + 2a * (9 + a)) = 0
((45 + 5a) + 2a * (9 + a)) = 0
(45 + 5a + (9 * 2a + a * 2a)) = 0
(45 + 5a + (18a + 2a2)) = 0

Combine like terms: 5a + 18a = 23a
(45 + 23a + 2a2) = 0

Solving
45 + 23a + 2a2 = 0

Solving for variable 'a'.

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

Subproblem 1

Set the factor '(9 + a)' equal to zero and attempt to solve: Simplifying 9 + a = 0 Solving 9 + a = 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 + a = 0 + -9 Combine like terms: 9 + -9 = 0 0 + a = 0 + -9 a = 0 + -9 Combine like terms: 0 + -9 = -9 a = -9 Simplifying a = -9

Subproblem 2

Set the factor '(5 + 2a)' equal to zero and attempt to solve: Simplifying 5 + 2a = 0 Solving 5 + 2a = 0 Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 2a = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 2a = 0 + -5 2a = 0 + -5 Combine like terms: 0 + -5 = -5 2a = -5 Divide each side by '2'. a = -2.5 Simplifying a = -2.5

Solution

a = {-9, -2.5}

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