3+10x(6+5x)=7x+16-3x

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Solution for 3+10x(6+5x)=7x+16-3x equation:


Simplifying
3 + 10x(6 + 5x) = 7x + 16 + -3x
3 + (6 * 10x + 5x * 10x) = 7x + 16 + -3x
3 + (60x + 50x2) = 7x + 16 + -3x

Reorder the terms:
3 + 60x + 50x2 = 16 + 7x + -3x

Combine like terms: 7x + -3x = 4x
3 + 60x + 50x2 = 16 + 4x

Solving
3 + 60x + 50x2 = 16 + 4x

Solving for variable 'x'.

Reorder the terms:
3 + -16 + 60x + -4x + 50x2 = 16 + 4x + -16 + -4x

Combine like terms: 3 + -16 = -13
-13 + 60x + -4x + 50x2 = 16 + 4x + -16 + -4x

Combine like terms: 60x + -4x = 56x
-13 + 56x + 50x2 = 16 + 4x + -16 + -4x

Reorder the terms:
-13 + 56x + 50x2 = 16 + -16 + 4x + -4x

Combine like terms: 16 + -16 = 0
-13 + 56x + 50x2 = 0 + 4x + -4x
-13 + 56x + 50x2 = 4x + -4x

Combine like terms: 4x + -4x = 0
-13 + 56x + 50x2 = 0

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

Divide each side by '50'.
-0.26 + 1.12x + x2 = 0.0

Move the constant term to the right:

Add '0.26' to each side of the equation.
-0.26 + 1.12x + 0.26 + x2 = 0.0 + 0.26

Reorder the terms:
-0.26 + 0.26 + 1.12x + x2 = 0.0 + 0.26

Combine like terms: -0.26 + 0.26 = 0.00
0.00 + 1.12x + x2 = 0.0 + 0.26
1.12x + x2 = 0.0 + 0.26

Combine like terms: 0.0 + 0.26 = 0.26
1.12x + x2 = 0.26

The x term is 1.12x.  Take half its coefficient (0.56).
Square it (0.3136) and add it to both sides.

Add '0.3136' to each side of the equation.
1.12x + 0.3136 + x2 = 0.26 + 0.3136

Reorder the terms:
0.3136 + 1.12x + x2 = 0.26 + 0.3136

Combine like terms: 0.26 + 0.3136 = 0.5736
0.3136 + 1.12x + x2 = 0.5736

Factor a perfect square on the left side:
(x + 0.56)(x + 0.56) = 0.5736

Calculate the square root of the right side: 0.757363849

Break this problem into two subproblems by setting 
(x + 0.56) equal to 0.757363849 and -0.757363849.

Subproblem 1

x + 0.56 = 0.757363849 Simplifying x + 0.56 = 0.757363849 Reorder the terms: 0.56 + x = 0.757363849 Solving 0.56 + x = 0.757363849 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.56' to each side of the equation. 0.56 + -0.56 + x = 0.757363849 + -0.56 Combine like terms: 0.56 + -0.56 = 0.00 0.00 + x = 0.757363849 + -0.56 x = 0.757363849 + -0.56 Combine like terms: 0.757363849 + -0.56 = 0.197363849 x = 0.197363849 Simplifying x = 0.197363849

Subproblem 2

x + 0.56 = -0.757363849 Simplifying x + 0.56 = -0.757363849 Reorder the terms: 0.56 + x = -0.757363849 Solving 0.56 + x = -0.757363849 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.56' to each side of the equation. 0.56 + -0.56 + x = -0.757363849 + -0.56 Combine like terms: 0.56 + -0.56 = 0.00 0.00 + x = -0.757363849 + -0.56 x = -0.757363849 + -0.56 Combine like terms: -0.757363849 + -0.56 = -1.317363849 x = -1.317363849 Simplifying x = -1.317363849

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.197363849, -1.317363849}

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