a^2+10a+28=7

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Solution for a^2+10a+28=7 equation:


Simplifying
a2 + 10a + 28 = 7

Reorder the terms:
28 + 10a + a2 = 7

Solving
28 + 10a + a2 = 7

Solving for variable 'a'.

Reorder the terms:
28 + -7 + 10a + a2 = 7 + -7

Combine like terms: 28 + -7 = 21
21 + 10a + a2 = 7 + -7

Combine like terms: 7 + -7 = 0
21 + 10a + a2 = 0

Factor a trinomial.
(7 + a)(3 + a) = 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 '(3 + a)' equal to zero and attempt to solve: Simplifying 3 + a = 0 Solving 3 + a = 0 Move all terms containing a to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + a = 0 + -3 Combine like terms: 3 + -3 = 0 0 + a = 0 + -3 a = 0 + -3 Combine like terms: 0 + -3 = -3 a = -3 Simplifying a = -3

Solution

a = {-7, -3}

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