3x+5x(5+9x)=6(4+5)

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Solution for 3x+5x(5+9x)=6(4+5) equation:


Simplifying
3x + 5x(5 + 9x) = 6(4 + 5)
3x + (5 * 5x + 9x * 5x) = 6(4 + 5)
3x + (25x + 45x2) = 6(4 + 5)

Combine like terms: 3x + 25x = 28x
28x + 45x2 = 6(4 + 5)

Combine like terms: 4 + 5 = 9
28x + 45x2 = 6(9)

Multiply 6 * 9
28x + 45x2 = 54

Solving
28x + 45x2 = 54

Solving for variable 'x'.

Reorder the terms:
-54 + 28x + 45x2 = 54 + -54

Combine like terms: 54 + -54 = 0
-54 + 28x + 45x2 = 0

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

Divide each side by '45'.
-1.2 + 0.6222222222x + x2 = 0

Move the constant term to the right:

Add '1.2' to each side of the equation.
-1.2 + 0.6222222222x + 1.2 + x2 = 0 + 1.2

Reorder the terms:
-1.2 + 1.2 + 0.6222222222x + x2 = 0 + 1.2

Combine like terms: -1.2 + 1.2 = 0.0
0.0 + 0.6222222222x + x2 = 0 + 1.2
0.6222222222x + x2 = 0 + 1.2

Combine like terms: 0 + 1.2 = 1.2
0.6222222222x + x2 = 1.2

The x term is 0.6222222222x.  Take half its coefficient (0.3111111111).
Square it (0.09679012345) and add it to both sides.

Add '0.09679012345' to each side of the equation.
0.6222222222x + 0.09679012345 + x2 = 1.2 + 0.09679012345

Reorder the terms:
0.09679012345 + 0.6222222222x + x2 = 1.2 + 0.09679012345

Combine like terms: 1.2 + 0.09679012345 = 1.29679012345
0.09679012345 + 0.6222222222x + x2 = 1.29679012345

Factor a perfect square on the left side:
(x + 0.3111111111)(x + 0.3111111111) = 1.29679012345

Calculate the square root of the right side: 1.138766931

Break this problem into two subproblems by setting 
(x + 0.3111111111) equal to 1.138766931 and -1.138766931.

Subproblem 1

x + 0.3111111111 = 1.138766931 Simplifying x + 0.3111111111 = 1.138766931 Reorder the terms: 0.3111111111 + x = 1.138766931 Solving 0.3111111111 + x = 1.138766931 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3111111111' to each side of the equation. 0.3111111111 + -0.3111111111 + x = 1.138766931 + -0.3111111111 Combine like terms: 0.3111111111 + -0.3111111111 = 0.0000000000 0.0000000000 + x = 1.138766931 + -0.3111111111 x = 1.138766931 + -0.3111111111 Combine like terms: 1.138766931 + -0.3111111111 = 0.8276558199 x = 0.8276558199 Simplifying x = 0.8276558199

Subproblem 2

x + 0.3111111111 = -1.138766931 Simplifying x + 0.3111111111 = -1.138766931 Reorder the terms: 0.3111111111 + x = -1.138766931 Solving 0.3111111111 + x = -1.138766931 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3111111111' to each side of the equation. 0.3111111111 + -0.3111111111 + x = -1.138766931 + -0.3111111111 Combine like terms: 0.3111111111 + -0.3111111111 = 0.0000000000 0.0000000000 + x = -1.138766931 + -0.3111111111 x = -1.138766931 + -0.3111111111 Combine like terms: -1.138766931 + -0.3111111111 = -1.4498780421 x = -1.4498780421 Simplifying x = -1.4498780421

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.8276558199, -1.4498780421}

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