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

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


Simplifying
(4a + -3a2) + (4 + 5a) = 0

Remove parenthesis around (4a + -3a2)
4a + -3a2 + (4 + 5a) = 0

Remove parenthesis around (4 + 5a)
4a + -3a2 + 4 + 5a = 0

Reorder the terms:
4 + 4a + 5a + -3a2 = 0

Combine like terms: 4a + 5a = 9a
4 + 9a + -3a2 = 0

Solving
4 + 9a + -3a2 = 0

Solving for variable 'a'.

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-1.333333333 + -3a + a2 = 0

Move the constant term to the right:

Add '1.333333333' to each side of the equation.
-1.333333333 + -3a + 1.333333333 + a2 = 0 + 1.333333333

Reorder the terms:
-1.333333333 + 1.333333333 + -3a + a2 = 0 + 1.333333333

Combine like terms: -1.333333333 + 1.333333333 = 0.000000000
0.000000000 + -3a + a2 = 0 + 1.333333333
-3a + a2 = 0 + 1.333333333

Combine like terms: 0 + 1.333333333 = 1.333333333
-3a + a2 = 1.333333333

The a term is -3a.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3a + 2.25 + a2 = 1.333333333 + 2.25

Reorder the terms:
2.25 + -3a + a2 = 1.333333333 + 2.25

Combine like terms: 1.333333333 + 2.25 = 3.583333333
2.25 + -3a + a2 = 3.583333333

Factor a perfect square on the left side:
(a + -1.5)(a + -1.5) = 3.583333333

Calculate the square root of the right side: 1.892969449

Break this problem into two subproblems by setting 
(a + -1.5) equal to 1.892969449 and -1.892969449.

Subproblem 1

a + -1.5 = 1.892969449 Simplifying a + -1.5 = 1.892969449 Reorder the terms: -1.5 + a = 1.892969449 Solving -1.5 + a = 1.892969449 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + a = 1.892969449 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + a = 1.892969449 + 1.5 a = 1.892969449 + 1.5 Combine like terms: 1.892969449 + 1.5 = 3.392969449 a = 3.392969449 Simplifying a = 3.392969449

Subproblem 2

a + -1.5 = -1.892969449 Simplifying a + -1.5 = -1.892969449 Reorder the terms: -1.5 + a = -1.892969449 Solving -1.5 + a = -1.892969449 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + a = -1.892969449 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + a = -1.892969449 + 1.5 a = -1.892969449 + 1.5 Combine like terms: -1.892969449 + 1.5 = -0.392969449 a = -0.392969449 Simplifying a = -0.392969449

Solution

The solution to the problem is based on the solutions from the subproblems. a = {3.392969449, -0.392969449}

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