5x^2-10x-17=7

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Solution for 5x^2-10x-17=7 equation:


Simplifying
5x2 + -10x + -17 = 7

Reorder the terms:
-17 + -10x + 5x2 = 7

Solving
-17 + -10x + 5x2 = 7

Solving for variable 'x'.

Reorder the terms:
-17 + -7 + -10x + 5x2 = 7 + -7

Combine like terms: -17 + -7 = -24
-24 + -10x + 5x2 = 7 + -7

Combine like terms: 7 + -7 = 0
-24 + -10x + 5x2 = 0

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

Divide each side by '5'.
-4.8 + -2x + x2 = 0

Move the constant term to the right:

Add '4.8' to each side of the equation.
-4.8 + -2x + 4.8 + x2 = 0 + 4.8

Reorder the terms:
-4.8 + 4.8 + -2x + x2 = 0 + 4.8

Combine like terms: -4.8 + 4.8 = 0.0
0.0 + -2x + x2 = 0 + 4.8
-2x + x2 = 0 + 4.8

Combine like terms: 0 + 4.8 = 4.8
-2x + x2 = 4.8

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 4.8 + 1

Reorder the terms:
1 + -2x + x2 = 4.8 + 1

Combine like terms: 4.8 + 1 = 5.8
1 + -2x + x2 = 5.8

Factor a perfect square on the left side:
(x + -1)(x + -1) = 5.8

Calculate the square root of the right side: 2.408318916

Break this problem into two subproblems by setting 
(x + -1) equal to 2.408318916 and -2.408318916.

Subproblem 1

x + -1 = 2.408318916 Simplifying x + -1 = 2.408318916 Reorder the terms: -1 + x = 2.408318916 Solving -1 + x = 2.408318916 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 2.408318916 + 1 Combine like terms: -1 + 1 = 0 0 + x = 2.408318916 + 1 x = 2.408318916 + 1 Combine like terms: 2.408318916 + 1 = 3.408318916 x = 3.408318916 Simplifying x = 3.408318916

Subproblem 2

x + -1 = -2.408318916 Simplifying x + -1 = -2.408318916 Reorder the terms: -1 + x = -2.408318916 Solving -1 + x = -2.408318916 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -2.408318916 + 1 Combine like terms: -1 + 1 = 0 0 + x = -2.408318916 + 1 x = -2.408318916 + 1 Combine like terms: -2.408318916 + 1 = -1.408318916 x = -1.408318916 Simplifying x = -1.408318916

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.408318916, -1.408318916}

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