8(a-7)(a+3)=0

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Solution for 8(a-7)(a+3)=0 equation:


Simplifying
8(a + -7)(a + 3) = 0

Reorder the terms:
8(-7 + a)(a + 3) = 0

Reorder the terms:
8(-7 + a)(3 + a) = 0

Multiply (-7 + a) * (3 + a)
8(-7(3 + a) + a(3 + a)) = 0
8((3 * -7 + a * -7) + a(3 + a)) = 0
8((-21 + -7a) + a(3 + a)) = 0
8(-21 + -7a + (3 * a + a * a)) = 0
8(-21 + -7a + (3a + a2)) = 0

Combine like terms: -7a + 3a = -4a
8(-21 + -4a + a2) = 0
(-21 * 8 + -4a * 8 + a2 * 8) = 0
(-168 + -32a + 8a2) = 0

Solving
-168 + -32a + 8a2 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), '8'.
8(-21 + -4a + a2) = 0

Factor a trinomial.
8((-3 + -1a)(7 + -1a)) = 0

Ignore the factor 8.

Subproblem 1

Set the factor '(-3 + -1a)' equal to zero and attempt to solve: Simplifying -3 + -1a = 0 Solving -3 + -1a = 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 + -1a = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1a = 0 + 3 -1a = 0 + 3 Combine like terms: 0 + 3 = 3 -1a = 3 Divide each side by '-1'. a = -3 Simplifying a = -3

Subproblem 2

Set the factor '(7 + -1a)' equal to zero and attempt to solve: Simplifying 7 + -1a = 0 Solving 7 + -1a = 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 + -1a = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1a = 0 + -7 -1a = 0 + -7 Combine like terms: 0 + -7 = -7 -1a = -7 Divide each side by '-1'. a = 7 Simplifying a = 7

Solution

a = {-3, 7}

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