x^2+9x-48=0

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Solution for x^2+9x-48=0 equation:


Simplifying
x2 + 9x + -48 = 0

Reorder the terms:
-48 + 9x + x2 = 0

Solving
-48 + 9x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '48' to each side of the equation.
-48 + 9x + 48 + x2 = 0 + 48

Reorder the terms:
-48 + 48 + 9x + x2 = 0 + 48

Combine like terms: -48 + 48 = 0
0 + 9x + x2 = 0 + 48
9x + x2 = 0 + 48

Combine like terms: 0 + 48 = 48
9x + x2 = 48

The x term is 9x.  Take half its coefficient (4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
9x + 20.25 + x2 = 48 + 20.25

Reorder the terms:
20.25 + 9x + x2 = 48 + 20.25

Combine like terms: 48 + 20.25 = 68.25
20.25 + 9x + x2 = 68.25

Factor a perfect square on the left side:
(x + 4.5)(x + 4.5) = 68.25

Calculate the square root of the right side: 8.261355821

Break this problem into two subproblems by setting 
(x + 4.5) equal to 8.261355821 and -8.261355821.

Subproblem 1

x + 4.5 = 8.261355821 Simplifying x + 4.5 = 8.261355821 Reorder the terms: 4.5 + x = 8.261355821 Solving 4.5 + x = 8.261355821 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = 8.261355821 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 8.261355821 + -4.5 x = 8.261355821 + -4.5 Combine like terms: 8.261355821 + -4.5 = 3.761355821 x = 3.761355821 Simplifying x = 3.761355821

Subproblem 2

x + 4.5 = -8.261355821 Simplifying x + 4.5 = -8.261355821 Reorder the terms: 4.5 + x = -8.261355821 Solving 4.5 + x = -8.261355821 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = -8.261355821 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -8.261355821 + -4.5 x = -8.261355821 + -4.5 Combine like terms: -8.261355821 + -4.5 = -12.761355821 x = -12.761355821 Simplifying x = -12.761355821

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.761355821, -12.761355821}

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