4x^2-43x+7=0

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Solution for 4x^2-43x+7=0 equation:


Simplifying
4x2 + -43x + 7 = 0

Reorder the terms:
7 + -43x + 4x2 = 0

Solving
7 + -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'.
1.75 + -10.75x + x2 = 0

Move the constant term to the right:

Add '-1.75' to each side of the equation.
1.75 + -10.75x + -1.75 + x2 = 0 + -1.75

Reorder the terms:
1.75 + -1.75 + -10.75x + x2 = 0 + -1.75

Combine like terms: 1.75 + -1.75 = 0.00
0.00 + -10.75x + x2 = 0 + -1.75
-10.75x + x2 = 0 + -1.75

Combine like terms: 0 + -1.75 = -1.75
-10.75x + x2 = -1.75

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 = -1.75 + 28.890625

Reorder the terms:
28.890625 + -10.75x + x2 = -1.75 + 28.890625

Combine like terms: -1.75 + 28.890625 = 27.140625
28.890625 + -10.75x + x2 = 27.140625

Factor a perfect square on the left side:
(x + -5.375)(x + -5.375) = 27.140625

Calculate the square root of the right side: 5.209666496

Break this problem into two subproblems by setting 
(x + -5.375) equal to 5.209666496 and -5.209666496.

Subproblem 1

x + -5.375 = 5.209666496 Simplifying x + -5.375 = 5.209666496 Reorder the terms: -5.375 + x = 5.209666496 Solving -5.375 + x = 5.209666496 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 = 5.209666496 + 5.375 Combine like terms: -5.375 + 5.375 = 0.000 0.000 + x = 5.209666496 + 5.375 x = 5.209666496 + 5.375 Combine like terms: 5.209666496 + 5.375 = 10.584666496 x = 10.584666496 Simplifying x = 10.584666496

Subproblem 2

x + -5.375 = -5.209666496 Simplifying x + -5.375 = -5.209666496 Reorder the terms: -5.375 + x = -5.209666496 Solving -5.375 + x = -5.209666496 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 = -5.209666496 + 5.375 Combine like terms: -5.375 + 5.375 = 0.000 0.000 + x = -5.209666496 + 5.375 x = -5.209666496 + 5.375 Combine like terms: -5.209666496 + 5.375 = 0.165333504 x = 0.165333504 Simplifying x = 0.165333504

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.584666496, 0.165333504}

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