4x^2=28x+49

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Solution for 4x^2=28x+49 equation:


Simplifying
4x2 = 28x + 49

Reorder the terms:
4x2 = 49 + 28x

Solving
4x2 = 49 + 28x

Solving for variable 'x'.

Reorder the terms:
-49 + -28x + 4x2 = 49 + 28x + -49 + -28x

Reorder the terms:
-49 + -28x + 4x2 = 49 + -49 + 28x + -28x

Combine like terms: 49 + -49 = 0
-49 + -28x + 4x2 = 0 + 28x + -28x
-49 + -28x + 4x2 = 28x + -28x

Combine like terms: 28x + -28x = 0
-49 + -28x + 4x2 = 0

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

Divide each side by '4'.
-12.25 + -7x + x2 = 0

Move the constant term to the right:

Add '12.25' to each side of the equation.
-12.25 + -7x + 12.25 + x2 = 0 + 12.25

Reorder the terms:
-12.25 + 12.25 + -7x + x2 = 0 + 12.25

Combine like terms: -12.25 + 12.25 = 0.00
0.00 + -7x + x2 = 0 + 12.25
-7x + x2 = 0 + 12.25

Combine like terms: 0 + 12.25 = 12.25
-7x + x2 = 12.25

The x term is -7x.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7x + 12.25 + x2 = 12.25 + 12.25

Reorder the terms:
12.25 + -7x + x2 = 12.25 + 12.25

Combine like terms: 12.25 + 12.25 = 24.5
12.25 + -7x + x2 = 24.5

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = 24.5

Calculate the square root of the right side: 4.949747468

Break this problem into two subproblems by setting 
(x + -3.5) equal to 4.949747468 and -4.949747468.

Subproblem 1

x + -3.5 = 4.949747468 Simplifying x + -3.5 = 4.949747468 Reorder the terms: -3.5 + x = 4.949747468 Solving -3.5 + x = 4.949747468 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = 4.949747468 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = 4.949747468 + 3.5 x = 4.949747468 + 3.5 Combine like terms: 4.949747468 + 3.5 = 8.449747468 x = 8.449747468 Simplifying x = 8.449747468

Subproblem 2

x + -3.5 = -4.949747468 Simplifying x + -3.5 = -4.949747468 Reorder the terms: -3.5 + x = -4.949747468 Solving -3.5 + x = -4.949747468 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = -4.949747468 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = -4.949747468 + 3.5 x = -4.949747468 + 3.5 Combine like terms: -4.949747468 + 3.5 = -1.449747468 x = -1.449747468 Simplifying x = -1.449747468

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.449747468, -1.449747468}

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