(11x^2-2x+15)+(5x^2+5x-46)=

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Solution for (11x^2-2x+15)+(5x^2+5x-46)= equation:


Simplifying
(11x2 + -2x + 15) + (5x2 + 5x + -46) = 0

Reorder the terms:
(15 + -2x + 11x2) + (5x2 + 5x + -46) = 0

Remove parenthesis around (15 + -2x + 11x2)
15 + -2x + 11x2 + (5x2 + 5x + -46) = 0

Reorder the terms:
15 + -2x + 11x2 + (-46 + 5x + 5x2) = 0

Remove parenthesis around (-46 + 5x + 5x2)
15 + -2x + 11x2 + -46 + 5x + 5x2 = 0

Reorder the terms:
15 + -46 + -2x + 5x + 11x2 + 5x2 = 0

Combine like terms: 15 + -46 = -31
-31 + -2x + 5x + 11x2 + 5x2 = 0

Combine like terms: -2x + 5x = 3x
-31 + 3x + 11x2 + 5x2 = 0

Combine like terms: 11x2 + 5x2 = 16x2
-31 + 3x + 16x2 = 0

Solving
-31 + 3x + 16x2 = 0

Solving for variable 'x'.

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

Divide each side by '16'.
-1.9375 + 0.1875x + x2 = 0

Move the constant term to the right:

Add '1.9375' to each side of the equation.
-1.9375 + 0.1875x + 1.9375 + x2 = 0 + 1.9375

Reorder the terms:
-1.9375 + 1.9375 + 0.1875x + x2 = 0 + 1.9375

Combine like terms: -1.9375 + 1.9375 = 0.0000
0.0000 + 0.1875x + x2 = 0 + 1.9375
0.1875x + x2 = 0 + 1.9375

Combine like terms: 0 + 1.9375 = 1.9375
0.1875x + x2 = 1.9375

The x term is 0.1875x.  Take half its coefficient (0.09375).
Square it (0.0087890625) and add it to both sides.

Add '0.0087890625' to each side of the equation.
0.1875x + 0.0087890625 + x2 = 1.9375 + 0.0087890625

Reorder the terms:
0.0087890625 + 0.1875x + x2 = 1.9375 + 0.0087890625

Combine like terms: 1.9375 + 0.0087890625 = 1.9462890625
0.0087890625 + 0.1875x + x2 = 1.9462890625

Factor a perfect square on the left side:
(x + 0.09375)(x + 0.09375) = 1.9462890625

Calculate the square root of the right side: 1.395094643

Break this problem into two subproblems by setting 
(x + 0.09375) equal to 1.395094643 and -1.395094643.

Subproblem 1

x + 0.09375 = 1.395094643 Simplifying x + 0.09375 = 1.395094643 Reorder the terms: 0.09375 + x = 1.395094643 Solving 0.09375 + x = 1.395094643 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.09375' to each side of the equation. 0.09375 + -0.09375 + x = 1.395094643 + -0.09375 Combine like terms: 0.09375 + -0.09375 = 0.00000 0.00000 + x = 1.395094643 + -0.09375 x = 1.395094643 + -0.09375 Combine like terms: 1.395094643 + -0.09375 = 1.301344643 x = 1.301344643 Simplifying x = 1.301344643

Subproblem 2

x + 0.09375 = -1.395094643 Simplifying x + 0.09375 = -1.395094643 Reorder the terms: 0.09375 + x = -1.395094643 Solving 0.09375 + x = -1.395094643 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.09375' to each side of the equation. 0.09375 + -0.09375 + x = -1.395094643 + -0.09375 Combine like terms: 0.09375 + -0.09375 = 0.00000 0.00000 + x = -1.395094643 + -0.09375 x = -1.395094643 + -0.09375 Combine like terms: -1.395094643 + -0.09375 = -1.488844643 x = -1.488844643 Simplifying x = -1.488844643

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.301344643, -1.488844643}

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