8x^2-73x+70=0

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Solution for 8x^2-73x+70=0 equation:


Simplifying
8x2 + -73x + 70 = 0

Reorder the terms:
70 + -73x + 8x2 = 0

Solving
70 + -73x + 8x2 = 0

Solving for variable 'x'.

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

Divide each side by '8'.
8.75 + -9.125x + x2 = 0

Move the constant term to the right:

Add '-8.75' to each side of the equation.
8.75 + -9.125x + -8.75 + x2 = 0 + -8.75

Reorder the terms:
8.75 + -8.75 + -9.125x + x2 = 0 + -8.75

Combine like terms: 8.75 + -8.75 = 0.00
0.00 + -9.125x + x2 = 0 + -8.75
-9.125x + x2 = 0 + -8.75

Combine like terms: 0 + -8.75 = -8.75
-9.125x + x2 = -8.75

The x term is -9.125x.  Take half its coefficient (-4.5625).
Square it (20.81640625) and add it to both sides.

Add '20.81640625' to each side of the equation.
-9.125x + 20.81640625 + x2 = -8.75 + 20.81640625

Reorder the terms:
20.81640625 + -9.125x + x2 = -8.75 + 20.81640625

Combine like terms: -8.75 + 20.81640625 = 12.06640625
20.81640625 + -9.125x + x2 = 12.06640625

Factor a perfect square on the left side:
(x + -4.5625)(x + -4.5625) = 12.06640625

Calculate the square root of the right side: 3.473673308

Break this problem into two subproblems by setting 
(x + -4.5625) equal to 3.473673308 and -3.473673308.

Subproblem 1

x + -4.5625 = 3.473673308 Simplifying x + -4.5625 = 3.473673308 Reorder the terms: -4.5625 + x = 3.473673308 Solving -4.5625 + x = 3.473673308 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5625' to each side of the equation. -4.5625 + 4.5625 + x = 3.473673308 + 4.5625 Combine like terms: -4.5625 + 4.5625 = 0.0000 0.0000 + x = 3.473673308 + 4.5625 x = 3.473673308 + 4.5625 Combine like terms: 3.473673308 + 4.5625 = 8.036173308 x = 8.036173308 Simplifying x = 8.036173308

Subproblem 2

x + -4.5625 = -3.473673308 Simplifying x + -4.5625 = -3.473673308 Reorder the terms: -4.5625 + x = -3.473673308 Solving -4.5625 + x = -3.473673308 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5625' to each side of the equation. -4.5625 + 4.5625 + x = -3.473673308 + 4.5625 Combine like terms: -4.5625 + 4.5625 = 0.0000 0.0000 + x = -3.473673308 + 4.5625 x = -3.473673308 + 4.5625 Combine like terms: -3.473673308 + 4.5625 = 1.088826692 x = 1.088826692 Simplifying x = 1.088826692

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.036173308, 1.088826692}

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