4x^2-1=3x+25

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Solution for 4x^2-1=3x+25 equation:


Simplifying
4x2 + -1 = 3x + 25

Reorder the terms:
-1 + 4x2 = 3x + 25

Reorder the terms:
-1 + 4x2 = 25 + 3x

Solving
-1 + 4x2 = 25 + 3x

Solving for variable 'x'.

Reorder the terms:
-1 + -25 + -3x + 4x2 = 25 + 3x + -25 + -3x

Combine like terms: -1 + -25 = -26
-26 + -3x + 4x2 = 25 + 3x + -25 + -3x

Reorder the terms:
-26 + -3x + 4x2 = 25 + -25 + 3x + -3x

Combine like terms: 25 + -25 = 0
-26 + -3x + 4x2 = 0 + 3x + -3x
-26 + -3x + 4x2 = 3x + -3x

Combine like terms: 3x + -3x = 0
-26 + -3x + 4x2 = 0

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

Divide each side by '4'.
-6.5 + -0.75x + x2 = 0

Move the constant term to the right:

Add '6.5' to each side of the equation.
-6.5 + -0.75x + 6.5 + x2 = 0 + 6.5

Reorder the terms:
-6.5 + 6.5 + -0.75x + x2 = 0 + 6.5

Combine like terms: -6.5 + 6.5 = 0.0
0.0 + -0.75x + x2 = 0 + 6.5
-0.75x + x2 = 0 + 6.5

Combine like terms: 0 + 6.5 = 6.5
-0.75x + x2 = 6.5

The x term is -0.75x.  Take half its coefficient (-0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
-0.75x + 0.140625 + x2 = 6.5 + 0.140625

Reorder the terms:
0.140625 + -0.75x + x2 = 6.5 + 0.140625

Combine like terms: 6.5 + 0.140625 = 6.640625
0.140625 + -0.75x + x2 = 6.640625

Factor a perfect square on the left side:
(x + -0.375)(x + -0.375) = 6.640625

Calculate the square root of the right side: 2.576941016

Break this problem into two subproblems by setting 
(x + -0.375) equal to 2.576941016 and -2.576941016.

Subproblem 1

x + -0.375 = 2.576941016 Simplifying x + -0.375 = 2.576941016 Reorder the terms: -0.375 + x = 2.576941016 Solving -0.375 + x = 2.576941016 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + x = 2.576941016 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + x = 2.576941016 + 0.375 x = 2.576941016 + 0.375 Combine like terms: 2.576941016 + 0.375 = 2.951941016 x = 2.951941016 Simplifying x = 2.951941016

Subproblem 2

x + -0.375 = -2.576941016 Simplifying x + -0.375 = -2.576941016 Reorder the terms: -0.375 + x = -2.576941016 Solving -0.375 + x = -2.576941016 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + x = -2.576941016 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + x = -2.576941016 + 0.375 x = -2.576941016 + 0.375 Combine like terms: -2.576941016 + 0.375 = -2.201941016 x = -2.201941016 Simplifying x = -2.201941016

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.951941016, -2.201941016}

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