50=l^2-3l

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Solution for 50=l^2-3l equation:


Simplifying
50 = l2 + -3l

Reorder the terms:
50 = -3l + l2

Solving
50 = -3l + l2

Solving for variable 'l'.

Reorder the terms:
50 + 3l + -1l2 = -3l + 3l + l2 + -1l2

Combine like terms: -3l + 3l = 0
50 + 3l + -1l2 = 0 + l2 + -1l2
50 + 3l + -1l2 = l2 + -1l2

Combine like terms: l2 + -1l2 = 0
50 + 3l + -1l2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-50 + -3l + l2 = 0

Move the constant term to the right:

Add '50' to each side of the equation.
-50 + -3l + 50 + l2 = 0 + 50

Reorder the terms:
-50 + 50 + -3l + l2 = 0 + 50

Combine like terms: -50 + 50 = 0
0 + -3l + l2 = 0 + 50
-3l + l2 = 0 + 50

Combine like terms: 0 + 50 = 50
-3l + l2 = 50

The l term is -3l.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3l + 2.25 + l2 = 50 + 2.25

Reorder the terms:
2.25 + -3l + l2 = 50 + 2.25

Combine like terms: 50 + 2.25 = 52.25
2.25 + -3l + l2 = 52.25

Factor a perfect square on the left side:
(l + -1.5)(l + -1.5) = 52.25

Calculate the square root of the right side: 7.228416147

Break this problem into two subproblems by setting 
(l + -1.5) equal to 7.228416147 and -7.228416147.

Subproblem 1

l + -1.5 = 7.228416147 Simplifying l + -1.5 = 7.228416147 Reorder the terms: -1.5 + l = 7.228416147 Solving -1.5 + l = 7.228416147 Solving for variable 'l'. Move all terms containing l to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + l = 7.228416147 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + l = 7.228416147 + 1.5 l = 7.228416147 + 1.5 Combine like terms: 7.228416147 + 1.5 = 8.728416147 l = 8.728416147 Simplifying l = 8.728416147

Subproblem 2

l + -1.5 = -7.228416147 Simplifying l + -1.5 = -7.228416147 Reorder the terms: -1.5 + l = -7.228416147 Solving -1.5 + l = -7.228416147 Solving for variable 'l'. Move all terms containing l to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + l = -7.228416147 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + l = -7.228416147 + 1.5 l = -7.228416147 + 1.5 Combine like terms: -7.228416147 + 1.5 = -5.728416147 l = -5.728416147 Simplifying l = -5.728416147

Solution

The solution to the problem is based on the solutions from the subproblems. l = {8.728416147, -5.728416147}

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