0=-4x^2+10x+13

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Solution for 0=-4x^2+10x+13 equation:


Simplifying
0 = -4x2 + 10x + 13

Reorder the terms:
0 = 13 + 10x + -4x2

Solving
0 = 13 + 10x + -4x2

Solving for variable 'x'.

Combine like terms: 0 + -13 = -13
-13 + -10x + 4x2 = 13 + 10x + -4x2 + -13 + -10x + 4x2

Reorder the terms:
-13 + -10x + 4x2 = 13 + -13 + 10x + -10x + -4x2 + 4x2

Combine like terms: 13 + -13 = 0
-13 + -10x + 4x2 = 0 + 10x + -10x + -4x2 + 4x2
-13 + -10x + 4x2 = 10x + -10x + -4x2 + 4x2

Combine like terms: 10x + -10x = 0
-13 + -10x + 4x2 = 0 + -4x2 + 4x2
-13 + -10x + 4x2 = -4x2 + 4x2

Combine like terms: -4x2 + 4x2 = 0
-13 + -10x + 4x2 = 0

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

Divide each side by '4'.
-3.25 + -2.5x + x2 = 0

Move the constant term to the right:

Add '3.25' to each side of the equation.
-3.25 + -2.5x + 3.25 + x2 = 0 + 3.25

Reorder the terms:
-3.25 + 3.25 + -2.5x + x2 = 0 + 3.25

Combine like terms: -3.25 + 3.25 = 0.00
0.00 + -2.5x + x2 = 0 + 3.25
-2.5x + x2 = 0 + 3.25

Combine like terms: 0 + 3.25 = 3.25
-2.5x + x2 = 3.25

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = 3.25 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = 3.25 + 1.5625

Combine like terms: 3.25 + 1.5625 = 4.8125
1.5625 + -2.5x + x2 = 4.8125

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = 4.8125

Calculate the square root of the right side: 2.193741097

Break this problem into two subproblems by setting 
(x + -1.25) equal to 2.193741097 and -2.193741097.

Subproblem 1

x + -1.25 = 2.193741097 Simplifying x + -1.25 = 2.193741097 Reorder the terms: -1.25 + x = 2.193741097 Solving -1.25 + x = 2.193741097 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 2.193741097 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 2.193741097 + 1.25 x = 2.193741097 + 1.25 Combine like terms: 2.193741097 + 1.25 = 3.443741097 x = 3.443741097 Simplifying x = 3.443741097

Subproblem 2

x + -1.25 = -2.193741097 Simplifying x + -1.25 = -2.193741097 Reorder the terms: -1.25 + x = -2.193741097 Solving -1.25 + x = -2.193741097 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -2.193741097 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -2.193741097 + 1.25 x = -2.193741097 + 1.25 Combine like terms: -2.193741097 + 1.25 = -0.943741097 x = -0.943741097 Simplifying x = -0.943741097

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.443741097, -0.943741097}

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