9(1-a^2)+3(a-1)-2=0

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Solution for 9(1-a^2)+3(a-1)-2=0 equation:


Simplifying
9(1 + -1a2) + 3(a + -1) + -2 = 0
(1 * 9 + -1a2 * 9) + 3(a + -1) + -2 = 0
(9 + -9a2) + 3(a + -1) + -2 = 0

Reorder the terms:
9 + -9a2 + 3(-1 + a) + -2 = 0
9 + -9a2 + (-1 * 3 + a * 3) + -2 = 0
9 + -9a2 + (-3 + 3a) + -2 = 0

Reorder the terms:
9 + -3 + -2 + 3a + -9a2 = 0

Combine like terms: 9 + -3 = 6
6 + -2 + 3a + -9a2 = 0

Combine like terms: 6 + -2 = 4
4 + 3a + -9a2 = 0

Solving
4 + 3a + -9a2 = 0

Solving for variable 'a'.

Begin completing the square.  Divide all terms by
-9 the coefficient of the squared term: 

Divide each side by '-9'.
-0.4444444444 + -0.3333333333a + a2 = 0

Move the constant term to the right:

Add '0.4444444444' to each side of the equation.
-0.4444444444 + -0.3333333333a + 0.4444444444 + a2 = 0 + 0.4444444444

Reorder the terms:
-0.4444444444 + 0.4444444444 + -0.3333333333a + a2 = 0 + 0.4444444444

Combine like terms: -0.4444444444 + 0.4444444444 = 0.0000000000
0.0000000000 + -0.3333333333a + a2 = 0 + 0.4444444444
-0.3333333333a + a2 = 0 + 0.4444444444

Combine like terms: 0 + 0.4444444444 = 0.4444444444
-0.3333333333a + a2 = 0.4444444444

The a term is -0.3333333333a.  Take half its coefficient (-0.1666666667).
Square it (0.02777777779) and add it to both sides.

Add '0.02777777779' to each side of the equation.
-0.3333333333a + 0.02777777779 + a2 = 0.4444444444 + 0.02777777779

Reorder the terms:
0.02777777779 + -0.3333333333a + a2 = 0.4444444444 + 0.02777777779

Combine like terms: 0.4444444444 + 0.02777777779 = 0.47222222219
0.02777777779 + -0.3333333333a + a2 = 0.47222222219

Factor a perfect square on the left side:
(a + -0.1666666667)(a + -0.1666666667) = 0.47222222219

Calculate the square root of the right side: 0.687184271

Break this problem into two subproblems by setting 
(a + -0.1666666667) equal to 0.687184271 and -0.687184271.

Subproblem 1

a + -0.1666666667 = 0.687184271 Simplifying a + -0.1666666667 = 0.687184271 Reorder the terms: -0.1666666667 + a = 0.687184271 Solving -0.1666666667 + a = 0.687184271 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '0.1666666667' to each side of the equation. -0.1666666667 + 0.1666666667 + a = 0.687184271 + 0.1666666667 Combine like terms: -0.1666666667 + 0.1666666667 = 0.0000000000 0.0000000000 + a = 0.687184271 + 0.1666666667 a = 0.687184271 + 0.1666666667 Combine like terms: 0.687184271 + 0.1666666667 = 0.8538509377 a = 0.8538509377 Simplifying a = 0.8538509377

Subproblem 2

a + -0.1666666667 = -0.687184271 Simplifying a + -0.1666666667 = -0.687184271 Reorder the terms: -0.1666666667 + a = -0.687184271 Solving -0.1666666667 + a = -0.687184271 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '0.1666666667' to each side of the equation. -0.1666666667 + 0.1666666667 + a = -0.687184271 + 0.1666666667 Combine like terms: -0.1666666667 + 0.1666666667 = 0.0000000000 0.0000000000 + a = -0.687184271 + 0.1666666667 a = -0.687184271 + 0.1666666667 Combine like terms: -0.687184271 + 0.1666666667 = -0.5205176043 a = -0.5205176043 Simplifying a = -0.5205176043

Solution

The solution to the problem is based on the solutions from the subproblems. a = {0.8538509377, -0.5205176043}

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