x^2+4x+4(10)=40(x+2)

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Solution for x^2+4x+4(10)=40(x+2) equation:


Simplifying
x2 + 4x + 4(10) = 40(x + 2)

Multiply 4 * 10
x2 + 4x + 40 = 40(x + 2)

Reorder the terms:
40 + 4x + x2 = 40(x + 2)

Reorder the terms:
40 + 4x + x2 = 40(2 + x)
40 + 4x + x2 = (2 * 40 + x * 40)
40 + 4x + x2 = (80 + 40x)

Solving
40 + 4x + x2 = 80 + 40x

Solving for variable 'x'.

Reorder the terms:
40 + -80 + 4x + -40x + x2 = 80 + 40x + -80 + -40x

Combine like terms: 40 + -80 = -40
-40 + 4x + -40x + x2 = 80 + 40x + -80 + -40x

Combine like terms: 4x + -40x = -36x
-40 + -36x + x2 = 80 + 40x + -80 + -40x

Reorder the terms:
-40 + -36x + x2 = 80 + -80 + 40x + -40x

Combine like terms: 80 + -80 = 0
-40 + -36x + x2 = 0 + 40x + -40x
-40 + -36x + x2 = 40x + -40x

Combine like terms: 40x + -40x = 0
-40 + -36x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '40' to each side of the equation.
-40 + -36x + 40 + x2 = 0 + 40

Reorder the terms:
-40 + 40 + -36x + x2 = 0 + 40

Combine like terms: -40 + 40 = 0
0 + -36x + x2 = 0 + 40
-36x + x2 = 0 + 40

Combine like terms: 0 + 40 = 40
-36x + x2 = 40

The x term is -36x.  Take half its coefficient (-18).
Square it (324) and add it to both sides.

Add '324' to each side of the equation.
-36x + 324 + x2 = 40 + 324

Reorder the terms:
324 + -36x + x2 = 40 + 324

Combine like terms: 40 + 324 = 364
324 + -36x + x2 = 364

Factor a perfect square on the left side:
(x + -18)(x + -18) = 364

Calculate the square root of the right side: 19.078784028

Break this problem into two subproblems by setting 
(x + -18) equal to 19.078784028 and -19.078784028.

Subproblem 1

x + -18 = 19.078784028 Simplifying x + -18 = 19.078784028 Reorder the terms: -18 + x = 19.078784028 Solving -18 + x = 19.078784028 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + x = 19.078784028 + 18 Combine like terms: -18 + 18 = 0 0 + x = 19.078784028 + 18 x = 19.078784028 + 18 Combine like terms: 19.078784028 + 18 = 37.078784028 x = 37.078784028 Simplifying x = 37.078784028

Subproblem 2

x + -18 = -19.078784028 Simplifying x + -18 = -19.078784028 Reorder the terms: -18 + x = -19.078784028 Solving -18 + x = -19.078784028 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + x = -19.078784028 + 18 Combine like terms: -18 + 18 = 0 0 + x = -19.078784028 + 18 x = -19.078784028 + 18 Combine like terms: -19.078784028 + 18 = -1.078784028 x = -1.078784028 Simplifying x = -1.078784028

Solution

The solution to the problem is based on the solutions from the subproblems. x = {37.078784028, -1.078784028}

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