5x^2+100x+3=0

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Solution for 5x^2+100x+3=0 equation:


Simplifying
5x2 + 100x + 3 = 0

Reorder the terms:
3 + 100x + 5x2 = 0

Solving
3 + 100x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
0.6 + 20x + x2 = 0

Move the constant term to the right:

Add '-0.6' to each side of the equation.
0.6 + 20x + -0.6 + x2 = 0 + -0.6

Reorder the terms:
0.6 + -0.6 + 20x + x2 = 0 + -0.6

Combine like terms: 0.6 + -0.6 = 0.0
0.0 + 20x + x2 = 0 + -0.6
20x + x2 = 0 + -0.6

Combine like terms: 0 + -0.6 = -0.6
20x + x2 = -0.6

The x term is 20x.  Take half its coefficient (10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
20x + 100 + x2 = -0.6 + 100

Reorder the terms:
100 + 20x + x2 = -0.6 + 100

Combine like terms: -0.6 + 100 = 99.4
100 + 20x + x2 = 99.4

Factor a perfect square on the left side:
(x + 10)(x + 10) = 99.4

Calculate the square root of the right side: 9.969954864

Break this problem into two subproblems by setting 
(x + 10) equal to 9.969954864 and -9.969954864.

Subproblem 1

x + 10 = 9.969954864 Simplifying x + 10 = 9.969954864 Reorder the terms: 10 + x = 9.969954864 Solving 10 + x = 9.969954864 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 9.969954864 + -10 Combine like terms: 10 + -10 = 0 0 + x = 9.969954864 + -10 x = 9.969954864 + -10 Combine like terms: 9.969954864 + -10 = -0.030045136 x = -0.030045136 Simplifying x = -0.030045136

Subproblem 2

x + 10 = -9.969954864 Simplifying x + 10 = -9.969954864 Reorder the terms: 10 + x = -9.969954864 Solving 10 + x = -9.969954864 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = -9.969954864 + -10 Combine like terms: 10 + -10 = 0 0 + x = -9.969954864 + -10 x = -9.969954864 + -10 Combine like terms: -9.969954864 + -10 = -19.969954864 x = -19.969954864 Simplifying x = -19.969954864

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.030045136, -19.969954864}

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