4x^2-43x+74=0

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Solution for 4x^2-43x+74=0 equation:


Simplifying
4x2 + -43x + 74 = 0

Reorder the terms:
74 + -43x + 4x2 = 0

Solving
74 + -43x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
18.5 + -10.75x + x2 = 0

Move the constant term to the right:

Add '-18.5' to each side of the equation.
18.5 + -10.75x + -18.5 + x2 = 0 + -18.5

Reorder the terms:
18.5 + -18.5 + -10.75x + x2 = 0 + -18.5

Combine like terms: 18.5 + -18.5 = 0.0
0.0 + -10.75x + x2 = 0 + -18.5
-10.75x + x2 = 0 + -18.5

Combine like terms: 0 + -18.5 = -18.5
-10.75x + x2 = -18.5

The x term is -10.75x.  Take half its coefficient (-5.375).
Square it (28.890625) and add it to both sides.

Add '28.890625' to each side of the equation.
-10.75x + 28.890625 + x2 = -18.5 + 28.890625

Reorder the terms:
28.890625 + -10.75x + x2 = -18.5 + 28.890625

Combine like terms: -18.5 + 28.890625 = 10.390625
28.890625 + -10.75x + x2 = 10.390625

Factor a perfect square on the left side:
(x + -5.375)(x + -5.375) = 10.390625

Calculate the square root of the right side: 3.22344924

Break this problem into two subproblems by setting 
(x + -5.375) equal to 3.22344924 and -3.22344924.

Subproblem 1

x + -5.375 = 3.22344924 Simplifying x + -5.375 = 3.22344924 Reorder the terms: -5.375 + x = 3.22344924 Solving -5.375 + x = 3.22344924 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.375' to each side of the equation. -5.375 + 5.375 + x = 3.22344924 + 5.375 Combine like terms: -5.375 + 5.375 = 0.000 0.000 + x = 3.22344924 + 5.375 x = 3.22344924 + 5.375 Combine like terms: 3.22344924 + 5.375 = 8.59844924 x = 8.59844924 Simplifying x = 8.59844924

Subproblem 2

x + -5.375 = -3.22344924 Simplifying x + -5.375 = -3.22344924 Reorder the terms: -5.375 + x = -3.22344924 Solving -5.375 + x = -3.22344924 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.375' to each side of the equation. -5.375 + 5.375 + x = -3.22344924 + 5.375 Combine like terms: -5.375 + 5.375 = 0.000 0.000 + x = -3.22344924 + 5.375 x = -3.22344924 + 5.375 Combine like terms: -3.22344924 + 5.375 = 2.15155076 x = 2.15155076 Simplifying x = 2.15155076

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.59844924, 2.15155076}

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