X^2+4X+8=35

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Solution for X^2+4X+8=35 equation:


Simplifying
X2 + 4X + 8 = 35

Reorder the terms:
8 + 4X + X2 = 35

Solving
8 + 4X + X2 = 35

Solving for variable 'X'.

Reorder the terms:
8 + -35 + 4X + X2 = 35 + -35

Combine like terms: 8 + -35 = -27
-27 + 4X + X2 = 35 + -35

Combine like terms: 35 + -35 = 0
-27 + 4X + X2 = 0

Begin completing the square.

Move the constant term to the right:

Add '27' to each side of the equation.
-27 + 4X + 27 + X2 = 0 + 27

Reorder the terms:
-27 + 27 + 4X + X2 = 0 + 27

Combine like terms: -27 + 27 = 0
0 + 4X + X2 = 0 + 27
4X + X2 = 0 + 27

Combine like terms: 0 + 27 = 27
4X + X2 = 27

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 = 27 + 4

Reorder the terms:
4 + 4X + X2 = 27 + 4

Combine like terms: 27 + 4 = 31
4 + 4X + X2 = 31

Factor a perfect square on the left side:
(X + 2)(X + 2) = 31

Calculate the square root of the right side: 5.567764363

Break this problem into two subproblems by setting 
(X + 2) equal to 5.567764363 and -5.567764363.

Subproblem 1

X + 2 = 5.567764363 Simplifying X + 2 = 5.567764363 Reorder the terms: 2 + X = 5.567764363 Solving 2 + X = 5.567764363 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 = 5.567764363 + -2 Combine like terms: 2 + -2 = 0 0 + X = 5.567764363 + -2 X = 5.567764363 + -2 Combine like terms: 5.567764363 + -2 = 3.567764363 X = 3.567764363 Simplifying X = 3.567764363

Subproblem 2

X + 2 = -5.567764363 Simplifying X + 2 = -5.567764363 Reorder the terms: 2 + X = -5.567764363 Solving 2 + X = -5.567764363 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 = -5.567764363 + -2 Combine like terms: 2 + -2 = 0 0 + X = -5.567764363 + -2 X = -5.567764363 + -2 Combine like terms: -5.567764363 + -2 = -7.567764363 X = -7.567764363 Simplifying X = -7.567764363

Solution

The solution to the problem is based on the solutions from the subproblems. X = {3.567764363, -7.567764363}

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