10x^2+11x-30=0

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Solution for 10x^2+11x-30=0 equation:


Simplifying
10x2 + 11x + -30 = 0

Reorder the terms:
-30 + 11x + 10x2 = 0

Solving
-30 + 11x + 10x2 = 0

Solving for variable 'x'.

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

Divide each side by '10'.
-3 + 1.1x + x2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + 1.1x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + 1.1x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 1.1x + x2 = 0 + 3
1.1x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
1.1x + x2 = 3

The x term is 1.1x.  Take half its coefficient (0.55).
Square it (0.3025) and add it to both sides.

Add '0.3025' to each side of the equation.
1.1x + 0.3025 + x2 = 3 + 0.3025

Reorder the terms:
0.3025 + 1.1x + x2 = 3 + 0.3025

Combine like terms: 3 + 0.3025 = 3.3025
0.3025 + 1.1x + x2 = 3.3025

Factor a perfect square on the left side:
(x + 0.55)(x + 0.55) = 3.3025

Calculate the square root of the right side: 1.817278185

Break this problem into two subproblems by setting 
(x + 0.55) equal to 1.817278185 and -1.817278185.

Subproblem 1

x + 0.55 = 1.817278185 Simplifying x + 0.55 = 1.817278185 Reorder the terms: 0.55 + x = 1.817278185 Solving 0.55 + x = 1.817278185 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.55' to each side of the equation. 0.55 + -0.55 + x = 1.817278185 + -0.55 Combine like terms: 0.55 + -0.55 = 0.00 0.00 + x = 1.817278185 + -0.55 x = 1.817278185 + -0.55 Combine like terms: 1.817278185 + -0.55 = 1.267278185 x = 1.267278185 Simplifying x = 1.267278185

Subproblem 2

x + 0.55 = -1.817278185 Simplifying x + 0.55 = -1.817278185 Reorder the terms: 0.55 + x = -1.817278185 Solving 0.55 + x = -1.817278185 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.55' to each side of the equation. 0.55 + -0.55 + x = -1.817278185 + -0.55 Combine like terms: 0.55 + -0.55 = 0.00 0.00 + x = -1.817278185 + -0.55 x = -1.817278185 + -0.55 Combine like terms: -1.817278185 + -0.55 = -2.367278185 x = -2.367278185 Simplifying x = -2.367278185

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.267278185, -2.367278185}

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