5X(X+10)=3(5X-6)

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Solution for 5X(X+10)=3(5X-6) equation:


Simplifying
5X(X + 10) = 3(5X + -6)

Reorder the terms:
5X(10 + X) = 3(5X + -6)
(10 * 5X + X * 5X) = 3(5X + -6)
(50X + 5X2) = 3(5X + -6)

Reorder the terms:
50X + 5X2 = 3(-6 + 5X)
50X + 5X2 = (-6 * 3 + 5X * 3)
50X + 5X2 = (-18 + 15X)

Solving
50X + 5X2 = -18 + 15X

Solving for variable 'X'.

Reorder the terms:
18 + 50X + -15X + 5X2 = -18 + 15X + 18 + -15X

Combine like terms: 50X + -15X = 35X
18 + 35X + 5X2 = -18 + 15X + 18 + -15X

Reorder the terms:
18 + 35X + 5X2 = -18 + 18 + 15X + -15X

Combine like terms: -18 + 18 = 0
18 + 35X + 5X2 = 0 + 15X + -15X
18 + 35X + 5X2 = 15X + -15X

Combine like terms: 15X + -15X = 0
18 + 35X + 5X2 = 0

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

Divide each side by '5'.
3.6 + 7X + X2 = 0

Move the constant term to the right:

Add '-3.6' to each side of the equation.
3.6 + 7X + -3.6 + X2 = 0 + -3.6

Reorder the terms:
3.6 + -3.6 + 7X + X2 = 0 + -3.6

Combine like terms: 3.6 + -3.6 = 0.0
0.0 + 7X + X2 = 0 + -3.6
7X + X2 = 0 + -3.6

Combine like terms: 0 + -3.6 = -3.6
7X + X2 = -3.6

The X term is 7X.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7X + 12.25 + X2 = -3.6 + 12.25

Reorder the terms:
12.25 + 7X + X2 = -3.6 + 12.25

Combine like terms: -3.6 + 12.25 = 8.65
12.25 + 7X + X2 = 8.65

Factor a perfect square on the left side:
(X + 3.5)(X + 3.5) = 8.65

Calculate the square root of the right side: 2.941088234

Break this problem into two subproblems by setting 
(X + 3.5) equal to 2.941088234 and -2.941088234.

Subproblem 1

X + 3.5 = 2.941088234 Simplifying X + 3.5 = 2.941088234 Reorder the terms: 3.5 + X = 2.941088234 Solving 3.5 + X = 2.941088234 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + X = 2.941088234 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + X = 2.941088234 + -3.5 X = 2.941088234 + -3.5 Combine like terms: 2.941088234 + -3.5 = -0.558911766 X = -0.558911766 Simplifying X = -0.558911766

Subproblem 2

X + 3.5 = -2.941088234 Simplifying X + 3.5 = -2.941088234 Reorder the terms: 3.5 + X = -2.941088234 Solving 3.5 + X = -2.941088234 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + X = -2.941088234 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + X = -2.941088234 + -3.5 X = -2.941088234 + -3.5 Combine like terms: -2.941088234 + -3.5 = -6.441088234 X = -6.441088234 Simplifying X = -6.441088234

Solution

The solution to the problem is based on the solutions from the subproblems. X = {-0.558911766, -6.441088234}

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