2x^2+8x+4x^2-7x-3=33

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Solution for 2x^2+8x+4x^2-7x-3=33 equation:


Simplifying
2x2 + 8x + 4x2 + -7x + -3 = 33

Reorder the terms:
-3 + 8x + -7x + 2x2 + 4x2 = 33

Combine like terms: 8x + -7x = 1x
-3 + 1x + 2x2 + 4x2 = 33

Combine like terms: 2x2 + 4x2 = 6x2
-3 + 1x + 6x2 = 33

Solving
-3 + 1x + 6x2 = 33

Solving for variable 'x'.

Reorder the terms:
-3 + -33 + 1x + 6x2 = 33 + -33

Combine like terms: -3 + -33 = -36
-36 + 1x + 6x2 = 33 + -33

Combine like terms: 33 + -33 = 0
-36 + 1x + 6x2 = 0

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

Divide each side by '6'.
-6 + 0.1666666667x + x2 = 0

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + 0.1666666667x + 6 + x2 = 0 + 6

Reorder the terms:
-6 + 6 + 0.1666666667x + x2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + 0.1666666667x + x2 = 0 + 6
0.1666666667x + x2 = 0 + 6

Combine like terms: 0 + 6 = 6
0.1666666667x + x2 = 6

The x term is 0.1666666667x.  Take half its coefficient (0.08333333335).
Square it (0.006944444447) and add it to both sides.

Add '0.006944444447' to each side of the equation.
0.1666666667x + 0.006944444447 + x2 = 6 + 0.006944444447

Reorder the terms:
0.006944444447 + 0.1666666667x + x2 = 6 + 0.006944444447

Combine like terms: 6 + 0.006944444447 = 6.006944444447
0.006944444447 + 0.1666666667x + x2 = 6.006944444447

Factor a perfect square on the left side:
(x + 0.08333333335)(x + 0.08333333335) = 6.006944444447

Calculate the square root of the right side: 2.450906862

Break this problem into two subproblems by setting 
(x + 0.08333333335) equal to 2.450906862 and -2.450906862.

Subproblem 1

x + 0.08333333335 = 2.450906862 Simplifying x + 0.08333333335 = 2.450906862 Reorder the terms: 0.08333333335 + x = 2.450906862 Solving 0.08333333335 + x = 2.450906862 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.08333333335' to each side of the equation. 0.08333333335 + -0.08333333335 + x = 2.450906862 + -0.08333333335 Combine like terms: 0.08333333335 + -0.08333333335 = 0.00000000000 0.00000000000 + x = 2.450906862 + -0.08333333335 x = 2.450906862 + -0.08333333335 Combine like terms: 2.450906862 + -0.08333333335 = 2.36757352865 x = 2.36757352865 Simplifying x = 2.36757352865

Subproblem 2

x + 0.08333333335 = -2.450906862 Simplifying x + 0.08333333335 = -2.450906862 Reorder the terms: 0.08333333335 + x = -2.450906862 Solving 0.08333333335 + x = -2.450906862 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.08333333335' to each side of the equation. 0.08333333335 + -0.08333333335 + x = -2.450906862 + -0.08333333335 Combine like terms: 0.08333333335 + -0.08333333335 = 0.00000000000 0.00000000000 + x = -2.450906862 + -0.08333333335 x = -2.450906862 + -0.08333333335 Combine like terms: -2.450906862 + -0.08333333335 = -2.53424019535 x = -2.53424019535 Simplifying x = -2.53424019535

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.36757352865, -2.53424019535}

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