4x^2-27x+13=7x+4

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Solution for 4x^2-27x+13=7x+4 equation:


Simplifying
4x2 + -27x + 13 = 7x + 4

Reorder the terms:
13 + -27x + 4x2 = 7x + 4

Reorder the terms:
13 + -27x + 4x2 = 4 + 7x

Solving
13 + -27x + 4x2 = 4 + 7x

Solving for variable 'x'.

Reorder the terms:
13 + -4 + -27x + -7x + 4x2 = 4 + 7x + -4 + -7x

Combine like terms: 13 + -4 = 9
9 + -27x + -7x + 4x2 = 4 + 7x + -4 + -7x

Combine like terms: -27x + -7x = -34x
9 + -34x + 4x2 = 4 + 7x + -4 + -7x

Reorder the terms:
9 + -34x + 4x2 = 4 + -4 + 7x + -7x

Combine like terms: 4 + -4 = 0
9 + -34x + 4x2 = 0 + 7x + -7x
9 + -34x + 4x2 = 7x + -7x

Combine like terms: 7x + -7x = 0
9 + -34x + 4x2 = 0

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

Divide each side by '4'.
2.25 + -8.5x + x2 = 0

Move the constant term to the right:

Add '-2.25' to each side of the equation.
2.25 + -8.5x + -2.25 + x2 = 0 + -2.25

Reorder the terms:
2.25 + -2.25 + -8.5x + x2 = 0 + -2.25

Combine like terms: 2.25 + -2.25 = 0.00
0.00 + -8.5x + x2 = 0 + -2.25
-8.5x + x2 = 0 + -2.25

Combine like terms: 0 + -2.25 = -2.25
-8.5x + x2 = -2.25

The x term is -8.5x.  Take half its coefficient (-4.25).
Square it (18.0625) and add it to both sides.

Add '18.0625' to each side of the equation.
-8.5x + 18.0625 + x2 = -2.25 + 18.0625

Reorder the terms:
18.0625 + -8.5x + x2 = -2.25 + 18.0625

Combine like terms: -2.25 + 18.0625 = 15.8125
18.0625 + -8.5x + x2 = 15.8125

Factor a perfect square on the left side:
(x + -4.25)(x + -4.25) = 15.8125

Calculate the square root of the right side: 3.97649343

Break this problem into two subproblems by setting 
(x + -4.25) equal to 3.97649343 and -3.97649343.

Subproblem 1

x + -4.25 = 3.97649343 Simplifying x + -4.25 = 3.97649343 Reorder the terms: -4.25 + x = 3.97649343 Solving -4.25 + x = 3.97649343 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.25' to each side of the equation. -4.25 + 4.25 + x = 3.97649343 + 4.25 Combine like terms: -4.25 + 4.25 = 0.00 0.00 + x = 3.97649343 + 4.25 x = 3.97649343 + 4.25 Combine like terms: 3.97649343 + 4.25 = 8.22649343 x = 8.22649343 Simplifying x = 8.22649343

Subproblem 2

x + -4.25 = -3.97649343 Simplifying x + -4.25 = -3.97649343 Reorder the terms: -4.25 + x = -3.97649343 Solving -4.25 + x = -3.97649343 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.25' to each side of the equation. -4.25 + 4.25 + x = -3.97649343 + 4.25 Combine like terms: -4.25 + 4.25 = 0.00 0.00 + x = -3.97649343 + 4.25 x = -3.97649343 + 4.25 Combine like terms: -3.97649343 + 4.25 = 0.27350657 x = 0.27350657 Simplifying x = 0.27350657

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.22649343, 0.27350657}

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