(3a+5)(a+3)=7

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Solution for (3a+5)(a+3)=7 equation:


Simplifying
(3a + 5)(a + 3) = 7

Reorder the terms:
(5 + 3a)(a + 3) = 7

Reorder the terms:
(5 + 3a)(3 + a) = 7

Multiply (5 + 3a) * (3 + a)
(5(3 + a) + 3a * (3 + a)) = 7
((3 * 5 + a * 5) + 3a * (3 + a)) = 7
((15 + 5a) + 3a * (3 + a)) = 7
(15 + 5a + (3 * 3a + a * 3a)) = 7
(15 + 5a + (9a + 3a2)) = 7

Combine like terms: 5a + 9a = 14a
(15 + 14a + 3a2) = 7

Solving
15 + 14a + 3a2 = 7

Solving for variable 'a'.

Reorder the terms:
15 + -7 + 14a + 3a2 = 7 + -7

Combine like terms: 15 + -7 = 8
8 + 14a + 3a2 = 7 + -7

Combine like terms: 7 + -7 = 0
8 + 14a + 3a2 = 0

Factor a trinomial.
(4 + a)(2 + 3a) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(2 + 3a)' equal to zero and attempt to solve: Simplifying 2 + 3a = 0 Solving 2 + 3a = 0 Move all terms containing a to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + 3a = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 3a = 0 + -2 3a = 0 + -2 Combine like terms: 0 + -2 = -2 3a = -2 Divide each side by '3'. a = -0.6666666667 Simplifying a = -0.6666666667

Solution

a = {-4, -0.6666666667}

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