(a+4)(a+5)=0

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Solution for (a+4)(a+5)=0 equation:


Simplifying
(a + 4)(a + 5) = 0

Reorder the terms:
(4 + a)(a + 5) = 0

Reorder the terms:
(4 + a)(5 + a) = 0

Multiply (4 + a) * (5 + a)
(4(5 + a) + a(5 + a)) = 0
((5 * 4 + a * 4) + a(5 + a)) = 0
((20 + 4a) + a(5 + a)) = 0
(20 + 4a + (5 * a + a * a)) = 0
(20 + 4a + (5a + a2)) = 0

Combine like terms: 4a + 5a = 9a
(20 + 9a + a2) = 0

Solving
20 + 9a + a2 = 0

Solving for variable 'a'.

Factor a trinomial.
(5 + a)(4 + a) = 0

Subproblem 1

Set the factor '(5 + a)' equal to zero and attempt to solve: Simplifying 5 + a = 0 Solving 5 + a = 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 + a = 0 + -5 Combine like terms: 5 + -5 = 0 0 + a = 0 + -5 a = 0 + -5 Combine like terms: 0 + -5 = -5 a = -5 Simplifying a = -5

Subproblem 2

Set the factor '(4 + a)' equal to zero and attempt to solve: Simplifying 4 + a = 0 Solving 4 + a = 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 + a = 0 + -4 Combine like terms: 4 + -4 = 0 0 + a = 0 + -4 a = 0 + -4 Combine like terms: 0 + -4 = -4 a = -4 Simplifying a = -4

Solution

a = {-5, -4}

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