17x^2+14x-13=2x^2-1

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Solution for 17x^2+14x-13=2x^2-1 equation:


Simplifying
17x2 + 14x + -13 = 2x2 + -1

Reorder the terms:
-13 + 14x + 17x2 = 2x2 + -1

Reorder the terms:
-13 + 14x + 17x2 = -1 + 2x2

Solving
-13 + 14x + 17x2 = -1 + 2x2

Solving for variable 'x'.

Reorder the terms:
-13 + 1 + 14x + 17x2 + -2x2 = -1 + 2x2 + 1 + -2x2

Combine like terms: -13 + 1 = -12
-12 + 14x + 17x2 + -2x2 = -1 + 2x2 + 1 + -2x2

Combine like terms: 17x2 + -2x2 = 15x2
-12 + 14x + 15x2 = -1 + 2x2 + 1 + -2x2

Reorder the terms:
-12 + 14x + 15x2 = -1 + 1 + 2x2 + -2x2

Combine like terms: -1 + 1 = 0
-12 + 14x + 15x2 = 0 + 2x2 + -2x2
-12 + 14x + 15x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-12 + 14x + 15x2 = 0

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

Divide each side by '15'.
-0.8 + 0.9333333333x + x2 = 0

Move the constant term to the right:

Add '0.8' to each side of the equation.
-0.8 + 0.9333333333x + 0.8 + x2 = 0 + 0.8

Reorder the terms:
-0.8 + 0.8 + 0.9333333333x + x2 = 0 + 0.8

Combine like terms: -0.8 + 0.8 = 0.0
0.0 + 0.9333333333x + x2 = 0 + 0.8
0.9333333333x + x2 = 0 + 0.8

Combine like terms: 0 + 0.8 = 0.8
0.9333333333x + x2 = 0.8

The x term is 0.9333333333x.  Take half its coefficient (0.4666666667).
Square it (0.2177777778) and add it to both sides.

Add '0.2177777778' to each side of the equation.
0.9333333333x + 0.2177777778 + x2 = 0.8 + 0.2177777778

Reorder the terms:
0.2177777778 + 0.9333333333x + x2 = 0.8 + 0.2177777778

Combine like terms: 0.8 + 0.2177777778 = 1.0177777778
0.2177777778 + 0.9333333333x + x2 = 1.0177777778

Factor a perfect square on the left side:
(x + 0.4666666667)(x + 0.4666666667) = 1.0177777778

Calculate the square root of the right side: 1.00884973

Break this problem into two subproblems by setting 
(x + 0.4666666667) equal to 1.00884973 and -1.00884973.

Subproblem 1

x + 0.4666666667 = 1.00884973 Simplifying x + 0.4666666667 = 1.00884973 Reorder the terms: 0.4666666667 + x = 1.00884973 Solving 0.4666666667 + x = 1.00884973 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4666666667' to each side of the equation. 0.4666666667 + -0.4666666667 + x = 1.00884973 + -0.4666666667 Combine like terms: 0.4666666667 + -0.4666666667 = 0.0000000000 0.0000000000 + x = 1.00884973 + -0.4666666667 x = 1.00884973 + -0.4666666667 Combine like terms: 1.00884973 + -0.4666666667 = 0.5421830633 x = 0.5421830633 Simplifying x = 0.5421830633

Subproblem 2

x + 0.4666666667 = -1.00884973 Simplifying x + 0.4666666667 = -1.00884973 Reorder the terms: 0.4666666667 + x = -1.00884973 Solving 0.4666666667 + x = -1.00884973 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4666666667' to each side of the equation. 0.4666666667 + -0.4666666667 + x = -1.00884973 + -0.4666666667 Combine like terms: 0.4666666667 + -0.4666666667 = 0.0000000000 0.0000000000 + x = -1.00884973 + -0.4666666667 x = -1.00884973 + -0.4666666667 Combine like terms: -1.00884973 + -0.4666666667 = -1.4755163967 x = -1.4755163967 Simplifying x = -1.4755163967

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.5421830633, -1.4755163967}

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