12x^2+25x=12

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Solution for 12x^2+25x=12 equation:


Simplifying
12x2 + 25x = 12

Reorder the terms:
25x + 12x2 = 12

Solving
25x + 12x2 = 12

Solving for variable 'x'.

Reorder the terms:
-12 + 25x + 12x2 = 12 + -12

Combine like terms: 12 + -12 = 0
-12 + 25x + 12x2 = 0

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

Divide each side by '12'.
-1 + 2.083333333x + x2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 2.083333333x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + 2.083333333x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 2.083333333x + x2 = 0 + 1
2.083333333x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
2.083333333x + x2 = 1

The x term is 2.083333333x.  Take half its coefficient (1.041666667).
Square it (1.085069445) and add it to both sides.

Add '1.085069445' to each side of the equation.
2.083333333x + 1.085069445 + x2 = 1 + 1.085069445

Reorder the terms:
1.085069445 + 2.083333333x + x2 = 1 + 1.085069445

Combine like terms: 1 + 1.085069445 = 2.085069445
1.085069445 + 2.083333333x + x2 = 2.085069445

Factor a perfect square on the left side:
(x + 1.041666667)(x + 1.041666667) = 2.085069445

Calculate the square root of the right side: 1.443976954

Break this problem into two subproblems by setting 
(x + 1.041666667) equal to 1.443976954 and -1.443976954.

Subproblem 1

x + 1.041666667 = 1.443976954 Simplifying x + 1.041666667 = 1.443976954 Reorder the terms: 1.041666667 + x = 1.443976954 Solving 1.041666667 + x = 1.443976954 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.041666667' to each side of the equation. 1.041666667 + -1.041666667 + x = 1.443976954 + -1.041666667 Combine like terms: 1.041666667 + -1.041666667 = 0.000000000 0.000000000 + x = 1.443976954 + -1.041666667 x = 1.443976954 + -1.041666667 Combine like terms: 1.443976954 + -1.041666667 = 0.402310287 x = 0.402310287 Simplifying x = 0.402310287

Subproblem 2

x + 1.041666667 = -1.443976954 Simplifying x + 1.041666667 = -1.443976954 Reorder the terms: 1.041666667 + x = -1.443976954 Solving 1.041666667 + x = -1.443976954 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.041666667' to each side of the equation. 1.041666667 + -1.041666667 + x = -1.443976954 + -1.041666667 Combine like terms: 1.041666667 + -1.041666667 = 0.000000000 0.000000000 + x = -1.443976954 + -1.041666667 x = -1.443976954 + -1.041666667 Combine like terms: -1.443976954 + -1.041666667 = -2.485643621 x = -2.485643621 Simplifying x = -2.485643621

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.402310287, -2.485643621}

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