(2a+3)(a-5)+(4a-5)(a-5)=

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Solution for (2a+3)(a-5)+(4a-5)(a-5)= equation:


Simplifying
(2a + 3)(a + -5) + (4a + -5)(a + -5) = 0

Reorder the terms:
(3 + 2a)(a + -5) + (4a + -5)(a + -5) = 0

Reorder the terms:
(3 + 2a)(-5 + a) + (4a + -5)(a + -5) = 0

Multiply (3 + 2a) * (-5 + a)
(3(-5 + a) + 2a * (-5 + a)) + (4a + -5)(a + -5) = 0
((-5 * 3 + a * 3) + 2a * (-5 + a)) + (4a + -5)(a + -5) = 0
((-15 + 3a) + 2a * (-5 + a)) + (4a + -5)(a + -5) = 0
(-15 + 3a + (-5 * 2a + a * 2a)) + (4a + -5)(a + -5) = 0
(-15 + 3a + (-10a + 2a2)) + (4a + -5)(a + -5) = 0

Combine like terms: 3a + -10a = -7a
(-15 + -7a + 2a2) + (4a + -5)(a + -5) = 0

Reorder the terms:
-15 + -7a + 2a2 + (-5 + 4a)(a + -5) = 0

Reorder the terms:
-15 + -7a + 2a2 + (-5 + 4a)(-5 + a) = 0

Multiply (-5 + 4a) * (-5 + a)
-15 + -7a + 2a2 + (-5(-5 + a) + 4a * (-5 + a)) = 0
-15 + -7a + 2a2 + ((-5 * -5 + a * -5) + 4a * (-5 + a)) = 0
-15 + -7a + 2a2 + ((25 + -5a) + 4a * (-5 + a)) = 0
-15 + -7a + 2a2 + (25 + -5a + (-5 * 4a + a * 4a)) = 0
-15 + -7a + 2a2 + (25 + -5a + (-20a + 4a2)) = 0

Combine like terms: -5a + -20a = -25a
-15 + -7a + 2a2 + (25 + -25a + 4a2) = 0

Reorder the terms:
-15 + 25 + -7a + -25a + 2a2 + 4a2 = 0

Combine like terms: -15 + 25 = 10
10 + -7a + -25a + 2a2 + 4a2 = 0

Combine like terms: -7a + -25a = -32a
10 + -32a + 2a2 + 4a2 = 0

Combine like terms: 2a2 + 4a2 = 6a2
10 + -32a + 6a2 = 0

Solving
10 + -32a + 6a2 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), '2'.
2(5 + -16a + 3a2) = 0

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

Ignore the factor 2.

Subproblem 1

Set the factor '(1 + -3a)' equal to zero and attempt to solve: Simplifying 1 + -3a = 0 Solving 1 + -3a = 0 Move all terms containing a to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -3a = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -3a = 0 + -1 -3a = 0 + -1 Combine like terms: 0 + -1 = -1 -3a = -1 Divide each side by '-3'. a = 0.3333333333 Simplifying a = 0.3333333333

Subproblem 2

Set the factor '(5 + -1a)' equal to zero and attempt to solve: Simplifying 5 + -1a = 0 Solving 5 + -1a = 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 + -1a = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1a = 0 + -5 -1a = 0 + -5 Combine like terms: 0 + -5 = -5 -1a = -5 Divide each side by '-1'. a = 5 Simplifying a = 5

Solution

a = {0.3333333333, 5}

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