4.9x^2+15x-50=0

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Solution for 4.9x^2+15x-50=0 equation:


Simplifying
4.9x2 + 15x + -50 = 0

Reorder the terms:
-50 + 15x + 4.9x2 = 0

Solving
-50 + 15x + 4.9x2 = 0

Solving for variable 'x'.

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

Divide each side by '4.9'.
-10.20408163 + 3.06122449x + x2 = 0

Move the constant term to the right:

Add '10.20408163' to each side of the equation.
-10.20408163 + 3.06122449x + 10.20408163 + x2 = 0 + 10.20408163

Reorder the terms:
-10.20408163 + 10.20408163 + 3.06122449x + x2 = 0 + 10.20408163

Combine like terms: -10.20408163 + 10.20408163 = 0.00000000
0.00000000 + 3.06122449x + x2 = 0 + 10.20408163
3.06122449x + x2 = 0 + 10.20408163

Combine like terms: 0 + 10.20408163 = 10.20408163
3.06122449x + x2 = 10.20408163

The x term is 3.06122449x.  Take half its coefficient (1.530612245).
Square it (2.342773845) and add it to both sides.

Add '2.342773845' to each side of the equation.
3.06122449x + 2.342773845 + x2 = 10.20408163 + 2.342773845

Reorder the terms:
2.342773845 + 3.06122449x + x2 = 10.20408163 + 2.342773845

Combine like terms: 10.20408163 + 2.342773845 = 12.546855475
2.342773845 + 3.06122449x + x2 = 12.546855475

Factor a perfect square on the left side:
(x + 1.530612245)(x + 1.530612245) = 12.546855475

Calculate the square root of the right side: 3.542154073

Break this problem into two subproblems by setting 
(x + 1.530612245) equal to 3.542154073 and -3.542154073.

Subproblem 1

x + 1.530612245 = 3.542154073 Simplifying x + 1.530612245 = 3.542154073 Reorder the terms: 1.530612245 + x = 3.542154073 Solving 1.530612245 + x = 3.542154073 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.530612245' to each side of the equation. 1.530612245 + -1.530612245 + x = 3.542154073 + -1.530612245 Combine like terms: 1.530612245 + -1.530612245 = 0.000000000 0.000000000 + x = 3.542154073 + -1.530612245 x = 3.542154073 + -1.530612245 Combine like terms: 3.542154073 + -1.530612245 = 2.011541828 x = 2.011541828 Simplifying x = 2.011541828

Subproblem 2

x + 1.530612245 = -3.542154073 Simplifying x + 1.530612245 = -3.542154073 Reorder the terms: 1.530612245 + x = -3.542154073 Solving 1.530612245 + x = -3.542154073 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.530612245' to each side of the equation. 1.530612245 + -1.530612245 + x = -3.542154073 + -1.530612245 Combine like terms: 1.530612245 + -1.530612245 = 0.000000000 0.000000000 + x = -3.542154073 + -1.530612245 x = -3.542154073 + -1.530612245 Combine like terms: -3.542154073 + -1.530612245 = -5.072766318 x = -5.072766318 Simplifying x = -5.072766318

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.011541828, -5.072766318}

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