4*3.14(x^2+25x+25)=

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Solution for 4*3.14(x^2+25x+25)= equation:


Simplifying
4 * 3.14(x2 + 25x + 25) = 0

Reorder the terms:
4 * 3.14(25 + 25x + x2) = 0

Multiply 4 * 3.14
12.56(25 + 25x + x2) = 0
(25 * 12.56 + 25x * 12.56 + x2 * 12.56) = 0
(314 + 314x + 12.56x2) = 0

Solving
314 + 314x + 12.56x2 = 0

Solving for variable 'x'.

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

Divide each side by '12.56'.
25 + 25x + x2 = 0

Move the constant term to the right:

Add '-25' to each side of the equation.
25 + 25x + -25 + x2 = 0 + -25

Reorder the terms:
25 + -25 + 25x + x2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + 25x + x2 = 0 + -25
25x + x2 = 0 + -25

Combine like terms: 0 + -25 = -25
25x + x2 = -25

The x term is 25x.  Take half its coefficient (12.5).
Square it (156.25) and add it to both sides.

Add '156.25' to each side of the equation.
25x + 156.25 + x2 = -25 + 156.25

Reorder the terms:
156.25 + 25x + x2 = -25 + 156.25

Combine like terms: -25 + 156.25 = 131.25
156.25 + 25x + x2 = 131.25

Factor a perfect square on the left side:
(x + 12.5)(x + 12.5) = 131.25

Calculate the square root of the right side: 11.456439237

Break this problem into two subproblems by setting 
(x + 12.5) equal to 11.456439237 and -11.456439237.

Subproblem 1

x + 12.5 = 11.456439237 Simplifying x + 12.5 = 11.456439237 Reorder the terms: 12.5 + x = 11.456439237 Solving 12.5 + x = 11.456439237 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12.5' to each side of the equation. 12.5 + -12.5 + x = 11.456439237 + -12.5 Combine like terms: 12.5 + -12.5 = 0.0 0.0 + x = 11.456439237 + -12.5 x = 11.456439237 + -12.5 Combine like terms: 11.456439237 + -12.5 = -1.043560763 x = -1.043560763 Simplifying x = -1.043560763

Subproblem 2

x + 12.5 = -11.456439237 Simplifying x + 12.5 = -11.456439237 Reorder the terms: 12.5 + x = -11.456439237 Solving 12.5 + x = -11.456439237 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12.5' to each side of the equation. 12.5 + -12.5 + x = -11.456439237 + -12.5 Combine like terms: 12.5 + -12.5 = 0.0 0.0 + x = -11.456439237 + -12.5 x = -11.456439237 + -12.5 Combine like terms: -11.456439237 + -12.5 = -23.956439237 x = -23.956439237 Simplifying x = -23.956439237

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.043560763, -23.956439237}

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