2x^2+7x-24-x^2-4=0

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Solution for 2x^2+7x-24-x^2-4=0 equation:


Simplifying
2x2 + 7x + -24 + -1x2 + -4 = 0

Reorder the terms:
-24 + -4 + 7x + 2x2 + -1x2 = 0

Combine like terms: -24 + -4 = -28
-28 + 7x + 2x2 + -1x2 = 0

Combine like terms: 2x2 + -1x2 = 1x2
-28 + 7x + 1x2 = 0

Solving
-28 + 7x + 1x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '28' to each side of the equation.
-28 + 7x + 28 + x2 = 0 + 28

Reorder the terms:
-28 + 28 + 7x + x2 = 0 + 28

Combine like terms: -28 + 28 = 0
0 + 7x + x2 = 0 + 28
7x + x2 = 0 + 28

Combine like terms: 0 + 28 = 28
7x + x2 = 28

The x term is 7x.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7x + 12.25 + x2 = 28 + 12.25

Reorder the terms:
12.25 + 7x + x2 = 28 + 12.25

Combine like terms: 28 + 12.25 = 40.25
12.25 + 7x + x2 = 40.25

Factor a perfect square on the left side:
(x + 3.5)(x + 3.5) = 40.25

Calculate the square root of the right side: 6.34428877

Break this problem into two subproblems by setting 
(x + 3.5) equal to 6.34428877 and -6.34428877.

Subproblem 1

x + 3.5 = 6.34428877 Simplifying x + 3.5 = 6.34428877 Reorder the terms: 3.5 + x = 6.34428877 Solving 3.5 + x = 6.34428877 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 6.34428877 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 6.34428877 + -3.5 x = 6.34428877 + -3.5 Combine like terms: 6.34428877 + -3.5 = 2.84428877 x = 2.84428877 Simplifying x = 2.84428877

Subproblem 2

x + 3.5 = -6.34428877 Simplifying x + 3.5 = -6.34428877 Reorder the terms: 3.5 + x = -6.34428877 Solving 3.5 + x = -6.34428877 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -6.34428877 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -6.34428877 + -3.5 x = -6.34428877 + -3.5 Combine like terms: -6.34428877 + -3.5 = -9.84428877 x = -9.84428877 Simplifying x = -9.84428877

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.84428877, -9.84428877}

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