4x(x+5)-11=4(4x)+17x+7

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Solution for 4x(x+5)-11=4(4x)+17x+7 equation:


Simplifying
4x(x + 5) + -11 = 4(4x) + 17x + 7

Reorder the terms:
4x(5 + x) + -11 = 4(4x) + 17x + 7
(5 * 4x + x * 4x) + -11 = 4(4x) + 17x + 7
(20x + 4x2) + -11 = 4(4x) + 17x + 7

Reorder the terms:
-11 + 20x + 4x2 = 4(4x) + 17x + 7

Remove parenthesis around (4x)
-11 + 20x + 4x2 = 4 * 4x + 17x + 7

Multiply 4 * 4
-11 + 20x + 4x2 = 16x + 17x + 7

Reorder the terms:
-11 + 20x + 4x2 = 7 + 16x + 17x

Combine like terms: 16x + 17x = 33x
-11 + 20x + 4x2 = 7 + 33x

Solving
-11 + 20x + 4x2 = 7 + 33x

Solving for variable 'x'.

Reorder the terms:
-11 + -7 + 20x + -33x + 4x2 = 7 + 33x + -7 + -33x

Combine like terms: -11 + -7 = -18
-18 + 20x + -33x + 4x2 = 7 + 33x + -7 + -33x

Combine like terms: 20x + -33x = -13x
-18 + -13x + 4x2 = 7 + 33x + -7 + -33x

Reorder the terms:
-18 + -13x + 4x2 = 7 + -7 + 33x + -33x

Combine like terms: 7 + -7 = 0
-18 + -13x + 4x2 = 0 + 33x + -33x
-18 + -13x + 4x2 = 33x + -33x

Combine like terms: 33x + -33x = 0
-18 + -13x + 4x2 = 0

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

Divide each side by '4'.
-4.5 + -3.25x + x2 = 0

Move the constant term to the right:

Add '4.5' to each side of the equation.
-4.5 + -3.25x + 4.5 + x2 = 0 + 4.5

Reorder the terms:
-4.5 + 4.5 + -3.25x + x2 = 0 + 4.5

Combine like terms: -4.5 + 4.5 = 0.0
0.0 + -3.25x + x2 = 0 + 4.5
-3.25x + x2 = 0 + 4.5

Combine like terms: 0 + 4.5 = 4.5
-3.25x + x2 = 4.5

The x term is -3.25x.  Take half its coefficient (-1.625).
Square it (2.640625) and add it to both sides.

Add '2.640625' to each side of the equation.
-3.25x + 2.640625 + x2 = 4.5 + 2.640625

Reorder the terms:
2.640625 + -3.25x + x2 = 4.5 + 2.640625

Combine like terms: 4.5 + 2.640625 = 7.140625
2.640625 + -3.25x + x2 = 7.140625

Factor a perfect square on the left side:
(x + -1.625)(x + -1.625) = 7.140625

Calculate the square root of the right side: 2.672194791

Break this problem into two subproblems by setting 
(x + -1.625) equal to 2.672194791 and -2.672194791.

Subproblem 1

x + -1.625 = 2.672194791 Simplifying x + -1.625 = 2.672194791 Reorder the terms: -1.625 + x = 2.672194791 Solving -1.625 + x = 2.672194791 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.625' to each side of the equation. -1.625 + 1.625 + x = 2.672194791 + 1.625 Combine like terms: -1.625 + 1.625 = 0.000 0.000 + x = 2.672194791 + 1.625 x = 2.672194791 + 1.625 Combine like terms: 2.672194791 + 1.625 = 4.297194791 x = 4.297194791 Simplifying x = 4.297194791

Subproblem 2

x + -1.625 = -2.672194791 Simplifying x + -1.625 = -2.672194791 Reorder the terms: -1.625 + x = -2.672194791 Solving -1.625 + x = -2.672194791 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.625' to each side of the equation. -1.625 + 1.625 + x = -2.672194791 + 1.625 Combine like terms: -1.625 + 1.625 = 0.000 0.000 + x = -2.672194791 + 1.625 x = -2.672194791 + 1.625 Combine like terms: -2.672194791 + 1.625 = -1.047194791 x = -1.047194791 Simplifying x = -1.047194791

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.297194791, -1.047194791}

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