4x^2+35x+64=0

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Solution for 4x^2+35x+64=0 equation:


Simplifying
4x2 + 35x + 64 = 0

Reorder the terms:
64 + 35x + 4x2 = 0

Solving
64 + 35x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
16 + 8.75x + x2 = 0

Move the constant term to the right:

Add '-16' to each side of the equation.
16 + 8.75x + -16 + x2 = 0 + -16

Reorder the terms:
16 + -16 + 8.75x + x2 = 0 + -16

Combine like terms: 16 + -16 = 0
0 + 8.75x + x2 = 0 + -16
8.75x + x2 = 0 + -16

Combine like terms: 0 + -16 = -16
8.75x + x2 = -16

The x term is 8.75x.  Take half its coefficient (4.375).
Square it (19.140625) and add it to both sides.

Add '19.140625' to each side of the equation.
8.75x + 19.140625 + x2 = -16 + 19.140625

Reorder the terms:
19.140625 + 8.75x + x2 = -16 + 19.140625

Combine like terms: -16 + 19.140625 = 3.140625
19.140625 + 8.75x + x2 = 3.140625

Factor a perfect square on the left side:
(x + 4.375)(x + 4.375) = 3.140625

Calculate the square root of the right side: 1.77218086

Break this problem into two subproblems by setting 
(x + 4.375) equal to 1.77218086 and -1.77218086.

Subproblem 1

x + 4.375 = 1.77218086 Simplifying x + 4.375 = 1.77218086 Reorder the terms: 4.375 + x = 1.77218086 Solving 4.375 + x = 1.77218086 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.375' to each side of the equation. 4.375 + -4.375 + x = 1.77218086 + -4.375 Combine like terms: 4.375 + -4.375 = 0.000 0.000 + x = 1.77218086 + -4.375 x = 1.77218086 + -4.375 Combine like terms: 1.77218086 + -4.375 = -2.60281914 x = -2.60281914 Simplifying x = -2.60281914

Subproblem 2

x + 4.375 = -1.77218086 Simplifying x + 4.375 = -1.77218086 Reorder the terms: 4.375 + x = -1.77218086 Solving 4.375 + x = -1.77218086 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.375' to each side of the equation. 4.375 + -4.375 + x = -1.77218086 + -4.375 Combine like terms: 4.375 + -4.375 = 0.000 0.000 + x = -1.77218086 + -4.375 x = -1.77218086 + -4.375 Combine like terms: -1.77218086 + -4.375 = -6.14718086 x = -6.14718086 Simplifying x = -6.14718086

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-2.60281914, -6.14718086}

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