-10x^2+11x+24=20

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Solution for -10x^2+11x+24=20 equation:


Simplifying
-10x2 + 11x + 24 = 20

Reorder the terms:
24 + 11x + -10x2 = 20

Solving
24 + 11x + -10x2 = 20

Solving for variable 'x'.

Reorder the terms:
24 + -20 + 11x + -10x2 = 20 + -20

Combine like terms: 24 + -20 = 4
4 + 11x + -10x2 = 20 + -20

Combine like terms: 20 + -20 = 0
4 + 11x + -10x2 = 0

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

Divide each side by '-10'.
-0.4 + -1.1x + x2 = 0

Move the constant term to the right:

Add '0.4' to each side of the equation.
-0.4 + -1.1x + 0.4 + x2 = 0 + 0.4

Reorder the terms:
-0.4 + 0.4 + -1.1x + x2 = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + -1.1x + x2 = 0 + 0.4
-1.1x + x2 = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
-1.1x + x2 = 0.4

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 = 0.4 + 0.3025

Reorder the terms:
0.3025 + -1.1x + x2 = 0.4 + 0.3025

Combine like terms: 0.4 + 0.3025 = 0.7025
0.3025 + -1.1x + x2 = 0.7025

Factor a perfect square on the left side:
(x + -0.55)(x + -0.55) = 0.7025

Calculate the square root of the right side: 0.838152731

Break this problem into two subproblems by setting 
(x + -0.55) equal to 0.838152731 and -0.838152731.

Subproblem 1

x + -0.55 = 0.838152731 Simplifying x + -0.55 = 0.838152731 Reorder the terms: -0.55 + x = 0.838152731 Solving -0.55 + x = 0.838152731 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 = 0.838152731 + 0.55 Combine like terms: -0.55 + 0.55 = 0.00 0.00 + x = 0.838152731 + 0.55 x = 0.838152731 + 0.55 Combine like terms: 0.838152731 + 0.55 = 1.388152731 x = 1.388152731 Simplifying x = 1.388152731

Subproblem 2

x + -0.55 = -0.838152731 Simplifying x + -0.55 = -0.838152731 Reorder the terms: -0.55 + x = -0.838152731 Solving -0.55 + x = -0.838152731 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 = -0.838152731 + 0.55 Combine like terms: -0.55 + 0.55 = 0.00 0.00 + x = -0.838152731 + 0.55 x = -0.838152731 + 0.55 Combine like terms: -0.838152731 + 0.55 = -0.288152731 x = -0.288152731 Simplifying x = -0.288152731

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.388152731, -0.288152731}

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