4x^2+3x+4=64

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Solution for 4x^2+3x+4=64 equation:


Simplifying
4x2 + 3x + 4 = 64

Reorder the terms:
4 + 3x + 4x2 = 64

Solving
4 + 3x + 4x2 = 64

Solving for variable 'x'.

Reorder the terms:
4 + -64 + 3x + 4x2 = 64 + -64

Combine like terms: 4 + -64 = -60
-60 + 3x + 4x2 = 64 + -64

Combine like terms: 64 + -64 = 0
-60 + 3x + 4x2 = 0

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

Divide each side by '4'.
-15 + 0.75x + x2 = 0

Move the constant term to the right:

Add '15' to each side of the equation.
-15 + 0.75x + 15 + x2 = 0 + 15

Reorder the terms:
-15 + 15 + 0.75x + x2 = 0 + 15

Combine like terms: -15 + 15 = 0
0 + 0.75x + x2 = 0 + 15
0.75x + x2 = 0 + 15

Combine like terms: 0 + 15 = 15
0.75x + x2 = 15

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 = 15 + 0.140625

Reorder the terms:
0.140625 + 0.75x + x2 = 15 + 0.140625

Combine like terms: 15 + 0.140625 = 15.140625
0.140625 + 0.75x + x2 = 15.140625

Factor a perfect square on the left side:
(x + 0.375)(x + 0.375) = 15.140625

Calculate the square root of the right side: 3.891095604

Break this problem into two subproblems by setting 
(x + 0.375) equal to 3.891095604 and -3.891095604.

Subproblem 1

x + 0.375 = 3.891095604 Simplifying x + 0.375 = 3.891095604 Reorder the terms: 0.375 + x = 3.891095604 Solving 0.375 + x = 3.891095604 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 = 3.891095604 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = 3.891095604 + -0.375 x = 3.891095604 + -0.375 Combine like terms: 3.891095604 + -0.375 = 3.516095604 x = 3.516095604 Simplifying x = 3.516095604

Subproblem 2

x + 0.375 = -3.891095604 Simplifying x + 0.375 = -3.891095604 Reorder the terms: 0.375 + x = -3.891095604 Solving 0.375 + x = -3.891095604 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 = -3.891095604 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = -3.891095604 + -0.375 x = -3.891095604 + -0.375 Combine like terms: -3.891095604 + -0.375 = -4.266095604 x = -4.266095604 Simplifying x = -4.266095604

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.516095604, -4.266095604}

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