(4a+5)(a+7)=0

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Solution for (4a+5)(a+7)=0 equation:


Simplifying
(4a + 5)(a + 7) = 0

Reorder the terms:
(5 + 4a)(a + 7) = 0

Reorder the terms:
(5 + 4a)(7 + a) = 0

Multiply (5 + 4a) * (7 + a)
(5(7 + a) + 4a * (7 + a)) = 0
((7 * 5 + a * 5) + 4a * (7 + a)) = 0
((35 + 5a) + 4a * (7 + a)) = 0
(35 + 5a + (7 * 4a + a * 4a)) = 0
(35 + 5a + (28a + 4a2)) = 0

Combine like terms: 5a + 28a = 33a
(35 + 33a + 4a2) = 0

Solving
35 + 33a + 4a2 = 0

Solving for variable 'a'.

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

Subproblem 1

Set the factor '(7 + a)' equal to zero and attempt to solve: Simplifying 7 + a = 0 Solving 7 + a = 0 Move all terms containing a to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + a = 0 + -7 Combine like terms: 7 + -7 = 0 0 + a = 0 + -7 a = 0 + -7 Combine like terms: 0 + -7 = -7 a = -7 Simplifying a = -7

Subproblem 2

Set the factor '(5 + 4a)' equal to zero and attempt to solve: Simplifying 5 + 4a = 0 Solving 5 + 4a = 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 + 4a = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 4a = 0 + -5 4a = 0 + -5 Combine like terms: 0 + -5 = -5 4a = -5 Divide each side by '4'. a = -1.25 Simplifying a = -1.25

Solution

a = {-7, -1.25}

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