(a-3)(a+1)+(a-3)(a+4)=0

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Solution for (a-3)(a+1)+(a-3)(a+4)=0 equation:


Simplifying
(a + -3)(a + 1) + (a + -3)(a + 4) = 0

Reorder the terms:
(-3 + a)(a + 1) + (a + -3)(a + 4) = 0

Reorder the terms:
(-3 + a)(1 + a) + (a + -3)(a + 4) = 0

Multiply (-3 + a) * (1 + a)
(-3(1 + a) + a(1 + a)) + (a + -3)(a + 4) = 0
((1 * -3 + a * -3) + a(1 + a)) + (a + -3)(a + 4) = 0
((-3 + -3a) + a(1 + a)) + (a + -3)(a + 4) = 0
(-3 + -3a + (1 * a + a * a)) + (a + -3)(a + 4) = 0
(-3 + -3a + (1a + a2)) + (a + -3)(a + 4) = 0

Combine like terms: -3a + 1a = -2a
(-3 + -2a + a2) + (a + -3)(a + 4) = 0

Reorder the terms:
-3 + -2a + a2 + (-3 + a)(a + 4) = 0

Reorder the terms:
-3 + -2a + a2 + (-3 + a)(4 + a) = 0

Multiply (-3 + a) * (4 + a)
-3 + -2a + a2 + (-3(4 + a) + a(4 + a)) = 0
-3 + -2a + a2 + ((4 * -3 + a * -3) + a(4 + a)) = 0
-3 + -2a + a2 + ((-12 + -3a) + a(4 + a)) = 0
-3 + -2a + a2 + (-12 + -3a + (4 * a + a * a)) = 0
-3 + -2a + a2 + (-12 + -3a + (4a + a2)) = 0

Combine like terms: -3a + 4a = 1a
-3 + -2a + a2 + (-12 + 1a + a2) = 0

Reorder the terms:
-3 + -12 + -2a + 1a + a2 + a2 = 0

Combine like terms: -3 + -12 = -15
-15 + -2a + 1a + a2 + a2 = 0

Combine like terms: -2a + 1a = -1a
-15 + -1a + a2 + a2 = 0

Combine like terms: a2 + a2 = 2a2
-15 + -1a + 2a2 = 0

Solving
-15 + -1a + 2a2 = 0

Solving for variable 'a'.

Factor a trinomial.
(-5 + -2a)(3 + -1a) = 0

Subproblem 1

Set the factor '(-5 + -2a)' equal to zero and attempt to solve: Simplifying -5 + -2a = 0 Solving -5 + -2a = 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 + -2a = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -2a = 0 + 5 -2a = 0 + 5 Combine like terms: 0 + 5 = 5 -2a = 5 Divide each side by '-2'. a = -2.5 Simplifying a = -2.5

Subproblem 2

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

Solution

a = {-2.5, 3}

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