1.256L^2+35.3L+27.98=625

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Solution for 1.256L^2+35.3L+27.98=625 equation:


Simplifying
1.256L2 + 35.3L + 27.98 = 625

Reorder the terms:
27.98 + 35.3L + 1.256L2 = 625

Solving
27.98 + 35.3L + 1.256L2 = 625

Solving for variable 'L'.

Reorder the terms:
27.98 + -625 + 35.3L + 1.256L2 = 625 + -625

Combine like terms: 27.98 + -625 = -597.02
-597.02 + 35.3L + 1.256L2 = 625 + -625

Combine like terms: 625 + -625 = 0
-597.02 + 35.3L + 1.256L2 = 0

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

Divide each side by '1.256'.
-475.3343949 + 28.10509554L + L2 = 0

Move the constant term to the right:

Add '475.3343949' to each side of the equation.
-475.3343949 + 28.10509554L + 475.3343949 + L2 = 0 + 475.3343949

Reorder the terms:
-475.3343949 + 475.3343949 + 28.10509554L + L2 = 0 + 475.3343949

Combine like terms: -475.3343949 + 475.3343949 = 0.0000000
0.0000000 + 28.10509554L + L2 = 0 + 475.3343949
28.10509554L + L2 = 0 + 475.3343949

Combine like terms: 0 + 475.3343949 = 475.3343949
28.10509554L + L2 = 475.3343949

The L term is 28.10509554L.  Take half its coefficient (14.05254777).
Square it (197.4740988) and add it to both sides.

Add '197.4740988' to each side of the equation.
28.10509554L + 197.4740988 + L2 = 475.3343949 + 197.4740988

Reorder the terms:
197.4740988 + 28.10509554L + L2 = 475.3343949 + 197.4740988

Combine like terms: 475.3343949 + 197.4740988 = 672.8084937
197.4740988 + 28.10509554L + L2 = 672.8084937

Factor a perfect square on the left side:
(L + 14.05254777)(L + 14.05254777) = 672.8084937

Calculate the square root of the right side: 25.938552267

Break this problem into two subproblems by setting 
(L + 14.05254777) equal to 25.938552267 and -25.938552267.

Subproblem 1

L + 14.05254777 = 25.938552267 Simplifying L + 14.05254777 = 25.938552267 Reorder the terms: 14.05254777 + L = 25.938552267 Solving 14.05254777 + L = 25.938552267 Solving for variable 'L'. Move all terms containing L to the left, all other terms to the right. Add '-14.05254777' to each side of the equation. 14.05254777 + -14.05254777 + L = 25.938552267 + -14.05254777 Combine like terms: 14.05254777 + -14.05254777 = 0.00000000 0.00000000 + L = 25.938552267 + -14.05254777 L = 25.938552267 + -14.05254777 Combine like terms: 25.938552267 + -14.05254777 = 11.886004497 L = 11.886004497 Simplifying L = 11.886004497

Subproblem 2

L + 14.05254777 = -25.938552267 Simplifying L + 14.05254777 = -25.938552267 Reorder the terms: 14.05254777 + L = -25.938552267 Solving 14.05254777 + L = -25.938552267 Solving for variable 'L'. Move all terms containing L to the left, all other terms to the right. Add '-14.05254777' to each side of the equation. 14.05254777 + -14.05254777 + L = -25.938552267 + -14.05254777 Combine like terms: 14.05254777 + -14.05254777 = 0.00000000 0.00000000 + L = -25.938552267 + -14.05254777 L = -25.938552267 + -14.05254777 Combine like terms: -25.938552267 + -14.05254777 = -39.991100037 L = -39.991100037 Simplifying L = -39.991100037

Solution

The solution to the problem is based on the solutions from the subproblems. L = {11.886004497, -39.991100037}

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