X(X+4)=49

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Solution for X(X+4)=49 equation:


Simplifying
X(X + 4) = 49

Reorder the terms:
X(4 + X) = 49
(4 * X + X * X) = 49
(4X + X2) = 49

Solving
4X + X2 = 49

Solving for variable 'X'.

Reorder the terms:
-49 + 4X + X2 = 49 + -49

Combine like terms: 49 + -49 = 0
-49 + 4X + X2 = 0

Begin completing the square.

Move the constant term to the right:

Add '49' to each side of the equation.
-49 + 4X + 49 + X2 = 0 + 49

Reorder the terms:
-49 + 49 + 4X + X2 = 0 + 49

Combine like terms: -49 + 49 = 0
0 + 4X + X2 = 0 + 49
4X + X2 = 0 + 49

Combine like terms: 0 + 49 = 49
4X + X2 = 49

The X term is 4X.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4X + 4 + X2 = 49 + 4

Reorder the terms:
4 + 4X + X2 = 49 + 4

Combine like terms: 49 + 4 = 53
4 + 4X + X2 = 53

Factor a perfect square on the left side:
(X + 2)(X + 2) = 53

Calculate the square root of the right side: 7.280109889

Break this problem into two subproblems by setting 
(X + 2) equal to 7.280109889 and -7.280109889.

Subproblem 1

X + 2 = 7.280109889 Simplifying X + 2 = 7.280109889 Reorder the terms: 2 + X = 7.280109889 Solving 2 + X = 7.280109889 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + X = 7.280109889 + -2 Combine like terms: 2 + -2 = 0 0 + X = 7.280109889 + -2 X = 7.280109889 + -2 Combine like terms: 7.280109889 + -2 = 5.280109889 X = 5.280109889 Simplifying X = 5.280109889

Subproblem 2

X + 2 = -7.280109889 Simplifying X + 2 = -7.280109889 Reorder the terms: 2 + X = -7.280109889 Solving 2 + X = -7.280109889 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + X = -7.280109889 + -2 Combine like terms: 2 + -2 = 0 0 + X = -7.280109889 + -2 X = -7.280109889 + -2 Combine like terms: -7.280109889 + -2 = -9.280109889 X = -9.280109889 Simplifying X = -9.280109889

Solution

The solution to the problem is based on the solutions from the subproblems. X = {5.280109889, -9.280109889}

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