64+9(x+2)(x+2)=84

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Solution for 64+9(x+2)(x+2)=84 equation:


Simplifying
64 + 9(x + 2)(x + 2) = 84

Reorder the terms:
64 + 9(2 + x)(x + 2) = 84

Reorder the terms:
64 + 9(2 + x)(2 + x) = 84

Multiply (2 + x) * (2 + x)
64 + 9(2(2 + x) + x(2 + x)) = 84
64 + 9((2 * 2 + x * 2) + x(2 + x)) = 84
64 + 9((4 + 2x) + x(2 + x)) = 84
64 + 9(4 + 2x + (2 * x + x * x)) = 84
64 + 9(4 + 2x + (2x + x2)) = 84

Combine like terms: 2x + 2x = 4x
64 + 9(4 + 4x + x2) = 84
64 + (4 * 9 + 4x * 9 + x2 * 9) = 84
64 + (36 + 36x + 9x2) = 84

Combine like terms: 64 + 36 = 100
100 + 36x + 9x2 = 84

Solving
100 + 36x + 9x2 = 84

Solving for variable 'x'.

Reorder the terms:
100 + -84 + 36x + 9x2 = 84 + -84

Combine like terms: 100 + -84 = 16
16 + 36x + 9x2 = 84 + -84

Combine like terms: 84 + -84 = 0
16 + 36x + 9x2 = 0

Begin completing the square.  Divide all terms by
9 the coefficient of the squared term: 

Divide each side by '9'.
1.777777778 + 4x + x2 = 0

Move the constant term to the right:

Add '-1.777777778' to each side of the equation.
1.777777778 + 4x + -1.777777778 + x2 = 0 + -1.777777778

Reorder the terms:
1.777777778 + -1.777777778 + 4x + x2 = 0 + -1.777777778

Combine like terms: 1.777777778 + -1.777777778 = 0.000000000
0.000000000 + 4x + x2 = 0 + -1.777777778
4x + x2 = 0 + -1.777777778

Combine like terms: 0 + -1.777777778 = -1.777777778
4x + x2 = -1.777777778

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 = -1.777777778 + 4

Reorder the terms:
4 + 4x + x2 = -1.777777778 + 4

Combine like terms: -1.777777778 + 4 = 2.222222222
4 + 4x + x2 = 2.222222222

Factor a perfect square on the left side:
(x + 2)(x + 2) = 2.222222222

Calculate the square root of the right side: 1.490711985

Break this problem into two subproblems by setting 
(x + 2) equal to 1.490711985 and -1.490711985.

Subproblem 1

x + 2 = 1.490711985 Simplifying x + 2 = 1.490711985 Reorder the terms: 2 + x = 1.490711985 Solving 2 + x = 1.490711985 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 = 1.490711985 + -2 Combine like terms: 2 + -2 = 0 0 + x = 1.490711985 + -2 x = 1.490711985 + -2 Combine like terms: 1.490711985 + -2 = -0.509288015 x = -0.509288015 Simplifying x = -0.509288015

Subproblem 2

x + 2 = -1.490711985 Simplifying x + 2 = -1.490711985 Reorder the terms: 2 + x = -1.490711985 Solving 2 + x = -1.490711985 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 = -1.490711985 + -2 Combine like terms: 2 + -2 = 0 0 + x = -1.490711985 + -2 x = -1.490711985 + -2 Combine like terms: -1.490711985 + -2 = -3.490711985 x = -3.490711985 Simplifying x = -3.490711985

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.509288015, -3.490711985}

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