4a+2a+4a^2-5=

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


Simplifying
4a + 2a + 4a2 + -5 = 0

Reorder the terms:
-5 + 4a + 2a + 4a2 = 0

Combine like terms: 4a + 2a = 6a
-5 + 6a + 4a2 = 0

Solving
-5 + 6a + 4a2 = 0

Solving for variable 'a'.

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

Divide each side by '4'.
-1.25 + 1.5a + a2 = 0

Move the constant term to the right:

Add '1.25' to each side of the equation.
-1.25 + 1.5a + 1.25 + a2 = 0 + 1.25

Reorder the terms:
-1.25 + 1.25 + 1.5a + a2 = 0 + 1.25

Combine like terms: -1.25 + 1.25 = 0.00
0.00 + 1.5a + a2 = 0 + 1.25
1.5a + a2 = 0 + 1.25

Combine like terms: 0 + 1.25 = 1.25
1.5a + a2 = 1.25

The a term is 1.5a.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5a + 0.5625 + a2 = 1.25 + 0.5625

Reorder the terms:
0.5625 + 1.5a + a2 = 1.25 + 0.5625

Combine like terms: 1.25 + 0.5625 = 1.8125
0.5625 + 1.5a + a2 = 1.8125

Factor a perfect square on the left side:
(a + 0.75)(a + 0.75) = 1.8125

Calculate the square root of the right side: 1.346291202

Break this problem into two subproblems by setting 
(a + 0.75) equal to 1.346291202 and -1.346291202.

Subproblem 1

a + 0.75 = 1.346291202 Simplifying a + 0.75 = 1.346291202 Reorder the terms: 0.75 + a = 1.346291202 Solving 0.75 + a = 1.346291202 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + a = 1.346291202 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + a = 1.346291202 + -0.75 a = 1.346291202 + -0.75 Combine like terms: 1.346291202 + -0.75 = 0.596291202 a = 0.596291202 Simplifying a = 0.596291202

Subproblem 2

a + 0.75 = -1.346291202 Simplifying a + 0.75 = -1.346291202 Reorder the terms: 0.75 + a = -1.346291202 Solving 0.75 + a = -1.346291202 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + a = -1.346291202 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + a = -1.346291202 + -0.75 a = -1.346291202 + -0.75 Combine like terms: -1.346291202 + -0.75 = -2.096291202 a = -2.096291202 Simplifying a = -2.096291202

Solution

The solution to the problem is based on the solutions from the subproblems. a = {0.596291202, -2.096291202}

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