(4x+7)(7x+7)=58x+121

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Solution for (4x+7)(7x+7)=58x+121 equation:


Simplifying
(4x + 7)(7x + 7) = 58x + 121

Reorder the terms:
(7 + 4x)(7x + 7) = 58x + 121

Reorder the terms:
(7 + 4x)(7 + 7x) = 58x + 121

Multiply (7 + 4x) * (7 + 7x)
(7(7 + 7x) + 4x * (7 + 7x)) = 58x + 121
((7 * 7 + 7x * 7) + 4x * (7 + 7x)) = 58x + 121
((49 + 49x) + 4x * (7 + 7x)) = 58x + 121
(49 + 49x + (7 * 4x + 7x * 4x)) = 58x + 121
(49 + 49x + (28x + 28x2)) = 58x + 121

Combine like terms: 49x + 28x = 77x
(49 + 77x + 28x2) = 58x + 121

Reorder the terms:
49 + 77x + 28x2 = 121 + 58x

Solving
49 + 77x + 28x2 = 121 + 58x

Solving for variable 'x'.

Reorder the terms:
49 + -121 + 77x + -58x + 28x2 = 121 + 58x + -121 + -58x

Combine like terms: 49 + -121 = -72
-72 + 77x + -58x + 28x2 = 121 + 58x + -121 + -58x

Combine like terms: 77x + -58x = 19x
-72 + 19x + 28x2 = 121 + 58x + -121 + -58x

Reorder the terms:
-72 + 19x + 28x2 = 121 + -121 + 58x + -58x

Combine like terms: 121 + -121 = 0
-72 + 19x + 28x2 = 0 + 58x + -58x
-72 + 19x + 28x2 = 58x + -58x

Combine like terms: 58x + -58x = 0
-72 + 19x + 28x2 = 0

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

Divide each side by '28'.
-2.571428571 + 0.6785714286x + x2 = 0

Move the constant term to the right:

Add '2.571428571' to each side of the equation.
-2.571428571 + 0.6785714286x + 2.571428571 + x2 = 0 + 2.571428571

Reorder the terms:
-2.571428571 + 2.571428571 + 0.6785714286x + x2 = 0 + 2.571428571

Combine like terms: -2.571428571 + 2.571428571 = 0.000000000
0.000000000 + 0.6785714286x + x2 = 0 + 2.571428571
0.6785714286x + x2 = 0 + 2.571428571

Combine like terms: 0 + 2.571428571 = 2.571428571
0.6785714286x + x2 = 2.571428571

The x term is 0.6785714286x.  Take half its coefficient (0.3392857143).
Square it (0.1151147959) and add it to both sides.

Add '0.1151147959' to each side of the equation.
0.6785714286x + 0.1151147959 + x2 = 2.571428571 + 0.1151147959

Reorder the terms:
0.1151147959 + 0.6785714286x + x2 = 2.571428571 + 0.1151147959

Combine like terms: 2.571428571 + 0.1151147959 = 2.6865433669
0.1151147959 + 0.6785714286x + x2 = 2.6865433669

Factor a perfect square on the left side:
(x + 0.3392857143)(x + 0.3392857143) = 2.6865433669

Calculate the square root of the right side: 1.639067835

Break this problem into two subproblems by setting 
(x + 0.3392857143) equal to 1.639067835 and -1.639067835.

Subproblem 1

x + 0.3392857143 = 1.639067835 Simplifying x + 0.3392857143 = 1.639067835 Reorder the terms: 0.3392857143 + x = 1.639067835 Solving 0.3392857143 + x = 1.639067835 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3392857143' to each side of the equation. 0.3392857143 + -0.3392857143 + x = 1.639067835 + -0.3392857143 Combine like terms: 0.3392857143 + -0.3392857143 = 0.0000000000 0.0000000000 + x = 1.639067835 + -0.3392857143 x = 1.639067835 + -0.3392857143 Combine like terms: 1.639067835 + -0.3392857143 = 1.2997821207 x = 1.2997821207 Simplifying x = 1.2997821207

Subproblem 2

x + 0.3392857143 = -1.639067835 Simplifying x + 0.3392857143 = -1.639067835 Reorder the terms: 0.3392857143 + x = -1.639067835 Solving 0.3392857143 + x = -1.639067835 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3392857143' to each side of the equation. 0.3392857143 + -0.3392857143 + x = -1.639067835 + -0.3392857143 Combine like terms: 0.3392857143 + -0.3392857143 = 0.0000000000 0.0000000000 + x = -1.639067835 + -0.3392857143 x = -1.639067835 + -0.3392857143 Combine like terms: -1.639067835 + -0.3392857143 = -1.9783535493 x = -1.9783535493 Simplifying x = -1.9783535493

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.2997821207, -1.9783535493}

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