16x^2+25x+1=0

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Solution for 16x^2+25x+1=0 equation:


Simplifying
16x2 + 25x + 1 = 0

Reorder the terms:
1 + 25x + 16x2 = 0

Solving
1 + 25x + 16x2 = 0

Solving for variable 'x'.

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

Divide each side by '16'.
0.0625 + 1.5625x + x2 = 0

Move the constant term to the right:

Add '-0.0625' to each side of the equation.
0.0625 + 1.5625x + -0.0625 + x2 = 0 + -0.0625

Reorder the terms:
0.0625 + -0.0625 + 1.5625x + x2 = 0 + -0.0625

Combine like terms: 0.0625 + -0.0625 = 0.0000
0.0000 + 1.5625x + x2 = 0 + -0.0625
1.5625x + x2 = 0 + -0.0625

Combine like terms: 0 + -0.0625 = -0.0625
1.5625x + x2 = -0.0625

The x term is 1.5625x.  Take half its coefficient (0.78125).
Square it (0.6103515625) and add it to both sides.

Add '0.6103515625' to each side of the equation.
1.5625x + 0.6103515625 + x2 = -0.0625 + 0.6103515625

Reorder the terms:
0.6103515625 + 1.5625x + x2 = -0.0625 + 0.6103515625

Combine like terms: -0.0625 + 0.6103515625 = 0.5478515625
0.6103515625 + 1.5625x + x2 = 0.5478515625

Factor a perfect square on the left side:
(x + 0.78125)(x + 0.78125) = 0.5478515625

Calculate the square root of the right side: 0.740169955

Break this problem into two subproblems by setting 
(x + 0.78125) equal to 0.740169955 and -0.740169955.

Subproblem 1

x + 0.78125 = 0.740169955 Simplifying x + 0.78125 = 0.740169955 Reorder the terms: 0.78125 + x = 0.740169955 Solving 0.78125 + x = 0.740169955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.78125' to each side of the equation. 0.78125 + -0.78125 + x = 0.740169955 + -0.78125 Combine like terms: 0.78125 + -0.78125 = 0.00000 0.00000 + x = 0.740169955 + -0.78125 x = 0.740169955 + -0.78125 Combine like terms: 0.740169955 + -0.78125 = -0.041080045 x = -0.041080045 Simplifying x = -0.041080045

Subproblem 2

x + 0.78125 = -0.740169955 Simplifying x + 0.78125 = -0.740169955 Reorder the terms: 0.78125 + x = -0.740169955 Solving 0.78125 + x = -0.740169955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.78125' to each side of the equation. 0.78125 + -0.78125 + x = -0.740169955 + -0.78125 Combine like terms: 0.78125 + -0.78125 = 0.00000 0.00000 + x = -0.740169955 + -0.78125 x = -0.740169955 + -0.78125 Combine like terms: -0.740169955 + -0.78125 = -1.521419955 x = -1.521419955 Simplifying x = -1.521419955

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.041080045, -1.521419955}

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