48x^2+42x-11=0

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Solution for 48x^2+42x-11=0 equation:


Simplifying
48x2 + 42x + -11 = 0

Reorder the terms:
-11 + 42x + 48x2 = 0

Solving
-11 + 42x + 48x2 = 0

Solving for variable 'x'.

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

Divide each side by '48'.
-0.2291666667 + 0.875x + x2 = 0

Move the constant term to the right:

Add '0.2291666667' to each side of the equation.
-0.2291666667 + 0.875x + 0.2291666667 + x2 = 0 + 0.2291666667

Reorder the terms:
-0.2291666667 + 0.2291666667 + 0.875x + x2 = 0 + 0.2291666667

Combine like terms: -0.2291666667 + 0.2291666667 = 0.0000000000
0.0000000000 + 0.875x + x2 = 0 + 0.2291666667
0.875x + x2 = 0 + 0.2291666667

Combine like terms: 0 + 0.2291666667 = 0.2291666667
0.875x + x2 = 0.2291666667

The x term is 0.875x.  Take half its coefficient (0.4375).
Square it (0.19140625) and add it to both sides.

Add '0.19140625' to each side of the equation.
0.875x + 0.19140625 + x2 = 0.2291666667 + 0.19140625

Reorder the terms:
0.19140625 + 0.875x + x2 = 0.2291666667 + 0.19140625

Combine like terms: 0.2291666667 + 0.19140625 = 0.4205729167
0.19140625 + 0.875x + x2 = 0.4205729167

Factor a perfect square on the left side:
(x + 0.4375)(x + 0.4375) = 0.4205729167

Calculate the square root of the right side: 0.648515934

Break this problem into two subproblems by setting 
(x + 0.4375) equal to 0.648515934 and -0.648515934.

Subproblem 1

x + 0.4375 = 0.648515934 Simplifying x + 0.4375 = 0.648515934 Reorder the terms: 0.4375 + x = 0.648515934 Solving 0.4375 + x = 0.648515934 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4375' to each side of the equation. 0.4375 + -0.4375 + x = 0.648515934 + -0.4375 Combine like terms: 0.4375 + -0.4375 = 0.0000 0.0000 + x = 0.648515934 + -0.4375 x = 0.648515934 + -0.4375 Combine like terms: 0.648515934 + -0.4375 = 0.211015934 x = 0.211015934 Simplifying x = 0.211015934

Subproblem 2

x + 0.4375 = -0.648515934 Simplifying x + 0.4375 = -0.648515934 Reorder the terms: 0.4375 + x = -0.648515934 Solving 0.4375 + x = -0.648515934 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4375' to each side of the equation. 0.4375 + -0.4375 + x = -0.648515934 + -0.4375 Combine like terms: 0.4375 + -0.4375 = 0.0000 0.0000 + x = -0.648515934 + -0.4375 x = -0.648515934 + -0.4375 Combine like terms: -0.648515934 + -0.4375 = -1.086015934 x = -1.086015934 Simplifying x = -1.086015934

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.211015934, -1.086015934}

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