(x+4)(x+4)=160

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Solution for (x+4)(x+4)=160 equation:


Simplifying
(x + 4)(x + 4) = 160

Reorder the terms:
(4 + x)(x + 4) = 160

Reorder the terms:
(4 + x)(4 + x) = 160

Multiply (4 + x) * (4 + x)
(4(4 + x) + x(4 + x)) = 160
((4 * 4 + x * 4) + x(4 + x)) = 160
((16 + 4x) + x(4 + x)) = 160
(16 + 4x + (4 * x + x * x)) = 160
(16 + 4x + (4x + x2)) = 160

Combine like terms: 4x + 4x = 8x
(16 + 8x + x2) = 160

Solving
16 + 8x + x2 = 160

Solving for variable 'x'.

Reorder the terms:
16 + -160 + 8x + x2 = 160 + -160

Combine like terms: 16 + -160 = -144
-144 + 8x + x2 = 160 + -160

Combine like terms: 160 + -160 = 0
-144 + 8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '144' to each side of the equation.
-144 + 8x + 144 + x2 = 0 + 144

Reorder the terms:
-144 + 144 + 8x + x2 = 0 + 144

Combine like terms: -144 + 144 = 0
0 + 8x + x2 = 0 + 144
8x + x2 = 0 + 144

Combine like terms: 0 + 144 = 144
8x + x2 = 144

The x term is 8x.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = 144 + 16

Reorder the terms:
16 + 8x + x2 = 144 + 16

Combine like terms: 144 + 16 = 160
16 + 8x + x2 = 160

Factor a perfect square on the left side:
(x + 4)(x + 4) = 160

Calculate the square root of the right side: 12.649110641

Break this problem into two subproblems by setting 
(x + 4) equal to 12.649110641 and -12.649110641.

Subproblem 1

x + 4 = 12.649110641 Simplifying x + 4 = 12.649110641 Reorder the terms: 4 + x = 12.649110641 Solving 4 + x = 12.649110641 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 12.649110641 + -4 Combine like terms: 4 + -4 = 0 0 + x = 12.649110641 + -4 x = 12.649110641 + -4 Combine like terms: 12.649110641 + -4 = 8.649110641 x = 8.649110641 Simplifying x = 8.649110641

Subproblem 2

x + 4 = -12.649110641 Simplifying x + 4 = -12.649110641 Reorder the terms: 4 + x = -12.649110641 Solving 4 + x = -12.649110641 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = -12.649110641 + -4 Combine like terms: 4 + -4 = 0 0 + x = -12.649110641 + -4 x = -12.649110641 + -4 Combine like terms: -12.649110641 + -4 = -16.649110641 x = -16.649110641 Simplifying x = -16.649110641

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.649110641, -16.649110641}

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