13x^2-8x+5=48

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Solution for 13x^2-8x+5=48 equation:


Simplifying
13x2 + -8x + 5 = 48

Reorder the terms:
5 + -8x + 13x2 = 48

Solving
5 + -8x + 13x2 = 48

Solving for variable 'x'.

Reorder the terms:
5 + -48 + -8x + 13x2 = 48 + -48

Combine like terms: 5 + -48 = -43
-43 + -8x + 13x2 = 48 + -48

Combine like terms: 48 + -48 = 0
-43 + -8x + 13x2 = 0

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

Divide each side by '13'.
-3.307692308 + -0.6153846154x + x2 = 0

Move the constant term to the right:

Add '3.307692308' to each side of the equation.
-3.307692308 + -0.6153846154x + 3.307692308 + x2 = 0 + 3.307692308

Reorder the terms:
-3.307692308 + 3.307692308 + -0.6153846154x + x2 = 0 + 3.307692308

Combine like terms: -3.307692308 + 3.307692308 = 0.000000000
0.000000000 + -0.6153846154x + x2 = 0 + 3.307692308
-0.6153846154x + x2 = 0 + 3.307692308

Combine like terms: 0 + 3.307692308 = 3.307692308
-0.6153846154x + x2 = 3.307692308

The x term is -0.6153846154x.  Take half its coefficient (-0.3076923077).
Square it (0.09467455622) and add it to both sides.

Add '0.09467455622' to each side of the equation.
-0.6153846154x + 0.09467455622 + x2 = 3.307692308 + 0.09467455622

Reorder the terms:
0.09467455622 + -0.6153846154x + x2 = 3.307692308 + 0.09467455622

Combine like terms: 3.307692308 + 0.09467455622 = 3.40236686422
0.09467455622 + -0.6153846154x + x2 = 3.40236686422

Factor a perfect square on the left side:
(x + -0.3076923077)(x + -0.3076923077) = 3.40236686422

Calculate the square root of the right side: 1.844550586

Break this problem into two subproblems by setting 
(x + -0.3076923077) equal to 1.844550586 and -1.844550586.

Subproblem 1

x + -0.3076923077 = 1.844550586 Simplifying x + -0.3076923077 = 1.844550586 Reorder the terms: -0.3076923077 + x = 1.844550586 Solving -0.3076923077 + x = 1.844550586 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3076923077' to each side of the equation. -0.3076923077 + 0.3076923077 + x = 1.844550586 + 0.3076923077 Combine like terms: -0.3076923077 + 0.3076923077 = 0.0000000000 0.0000000000 + x = 1.844550586 + 0.3076923077 x = 1.844550586 + 0.3076923077 Combine like terms: 1.844550586 + 0.3076923077 = 2.1522428937 x = 2.1522428937 Simplifying x = 2.1522428937

Subproblem 2

x + -0.3076923077 = -1.844550586 Simplifying x + -0.3076923077 = -1.844550586 Reorder the terms: -0.3076923077 + x = -1.844550586 Solving -0.3076923077 + x = -1.844550586 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3076923077' to each side of the equation. -0.3076923077 + 0.3076923077 + x = -1.844550586 + 0.3076923077 Combine like terms: -0.3076923077 + 0.3076923077 = 0.0000000000 0.0000000000 + x = -1.844550586 + 0.3076923077 x = -1.844550586 + 0.3076923077 Combine like terms: -1.844550586 + 0.3076923077 = -1.5368582783 x = -1.5368582783 Simplifying x = -1.5368582783

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.1522428937, -1.5368582783}

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