0=4*(x^2)-10*x-49

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Solution for 0=4*(x^2)-10*x-49 equation:


Simplifying
0 = 4(x2) + -10x + -49

Reorder the terms:
0 = -49 + -10x + 4x2

Solving
0 = -49 + -10x + 4x2

Solving for variable 'x'.

Combine like terms: 0 + 49 = 49
49 + 10x + -4x2 = -49 + -10x + 4x2 + 49 + 10x + -4x2

Reorder the terms:
49 + 10x + -4x2 = -49 + 49 + -10x + 10x + 4x2 + -4x2

Combine like terms: -49 + 49 = 0
49 + 10x + -4x2 = 0 + -10x + 10x + 4x2 + -4x2
49 + 10x + -4x2 = -10x + 10x + 4x2 + -4x2

Combine like terms: -10x + 10x = 0
49 + 10x + -4x2 = 0 + 4x2 + -4x2
49 + 10x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
49 + 10x + -4x2 = 0

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

Divide each side by '-4'.
-12.25 + -2.5x + x2 = 0

Move the constant term to the right:

Add '12.25' to each side of the equation.
-12.25 + -2.5x + 12.25 + x2 = 0 + 12.25

Reorder the terms:
-12.25 + 12.25 + -2.5x + x2 = 0 + 12.25

Combine like terms: -12.25 + 12.25 = 0.00
0.00 + -2.5x + x2 = 0 + 12.25
-2.5x + x2 = 0 + 12.25

Combine like terms: 0 + 12.25 = 12.25
-2.5x + x2 = 12.25

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = 12.25 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = 12.25 + 1.5625

Combine like terms: 12.25 + 1.5625 = 13.8125
1.5625 + -2.5x + x2 = 13.8125

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = 13.8125

Calculate the square root of the right side: 3.716517187

Break this problem into two subproblems by setting 
(x + -1.25) equal to 3.716517187 and -3.716517187.

Subproblem 1

x + -1.25 = 3.716517187 Simplifying x + -1.25 = 3.716517187 Reorder the terms: -1.25 + x = 3.716517187 Solving -1.25 + x = 3.716517187 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 3.716517187 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 3.716517187 + 1.25 x = 3.716517187 + 1.25 Combine like terms: 3.716517187 + 1.25 = 4.966517187 x = 4.966517187 Simplifying x = 4.966517187

Subproblem 2

x + -1.25 = -3.716517187 Simplifying x + -1.25 = -3.716517187 Reorder the terms: -1.25 + x = -3.716517187 Solving -1.25 + x = -3.716517187 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -3.716517187 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -3.716517187 + 1.25 x = -3.716517187 + 1.25 Combine like terms: -3.716517187 + 1.25 = -2.466517187 x = -2.466517187 Simplifying x = -2.466517187

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.966517187, -2.466517187}

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