(2a+4)(a+7)=0

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Solution for (2a+4)(a+7)=0 equation:


Simplifying
(2a + 4)(a + 7) = 0

Reorder the terms:
(4 + 2a)(a + 7) = 0

Reorder the terms:
(4 + 2a)(7 + a) = 0

Multiply (4 + 2a) * (7 + a)
(4(7 + a) + 2a * (7 + a)) = 0
((7 * 4 + a * 4) + 2a * (7 + a)) = 0
((28 + 4a) + 2a * (7 + a)) = 0
(28 + 4a + (7 * 2a + a * 2a)) = 0
(28 + 4a + (14a + 2a2)) = 0

Combine like terms: 4a + 14a = 18a
(28 + 18a + 2a2) = 0

Solving
28 + 18a + 2a2 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), '2'.
2(14 + 9a + a2) = 0

Factor a trinomial.
2((7 + a)(2 + a)) = 0

Ignore the factor 2.

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 '(2 + a)' equal to zero and attempt to solve: Simplifying 2 + a = 0 Solving 2 + a = 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 + a = 0 + -2 Combine like terms: 2 + -2 = 0 0 + a = 0 + -2 a = 0 + -2 Combine like terms: 0 + -2 = -2 a = -2 Simplifying a = -2

Solution

a = {-7, -2}

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