x^2+5x=48

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Solution for x^2+5x=48 equation:


Simplifying
x2 + 5x = 48

Reorder the terms:
5x + x2 = 48

Solving
5x + x2 = 48

Solving for variable 'x'.

Reorder the terms:
-48 + 5x + x2 = 48 + -48

Combine like terms: 48 + -48 = 0
-48 + 5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '48' to each side of the equation.
-48 + 5x + 48 + x2 = 0 + 48

Reorder the terms:
-48 + 48 + 5x + x2 = 0 + 48

Combine like terms: -48 + 48 = 0
0 + 5x + x2 = 0 + 48
5x + x2 = 0 + 48

Combine like terms: 0 + 48 = 48
5x + x2 = 48

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = 48 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 48 + 6.25

Combine like terms: 48 + 6.25 = 54.25
6.25 + 5x + x2 = 54.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 54.25

Calculate the square root of the right side: 7.365459931

Break this problem into two subproblems by setting 
(x + 2.5) equal to 7.365459931 and -7.365459931.

Subproblem 1

x + 2.5 = 7.365459931 Simplifying x + 2.5 = 7.365459931 Reorder the terms: 2.5 + x = 7.365459931 Solving 2.5 + x = 7.365459931 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 7.365459931 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 7.365459931 + -2.5 x = 7.365459931 + -2.5 Combine like terms: 7.365459931 + -2.5 = 4.865459931 x = 4.865459931 Simplifying x = 4.865459931

Subproblem 2

x + 2.5 = -7.365459931 Simplifying x + 2.5 = -7.365459931 Reorder the terms: 2.5 + x = -7.365459931 Solving 2.5 + x = -7.365459931 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -7.365459931 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -7.365459931 + -2.5 x = -7.365459931 + -2.5 Combine like terms: -7.365459931 + -2.5 = -9.865459931 x = -9.865459931 Simplifying x = -9.865459931

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.865459931, -9.865459931}

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