20(5e)-471+2e^2=e

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Solution for 20(5e)-471+2e^2=e equation:


Simplifying
20(5e) + -471 + 2e2 = e

Remove parenthesis around (5e)
20 * 5e + -471 + 2e2 = e

Multiply 20 * 5
100e + -471 + 2e2 = e

Reorder the terms:
-471 + 100e + 2e2 = e

Solving
-471 + 100e + 2e2 = e

Solving for variable 'e'.

Reorder the terms:
-471 + 100e + -1e + 2e2 = e + -1e

Combine like terms: 100e + -1e = 99e
-471 + 99e + 2e2 = e + -1e

Combine like terms: e + -1e = 0
-471 + 99e + 2e2 = 0

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

Divide each side by '2'.
-235.5 + 49.5e + e2 = 0

Move the constant term to the right:

Add '235.5' to each side of the equation.
-235.5 + 49.5e + 235.5 + e2 = 0 + 235.5

Reorder the terms:
-235.5 + 235.5 + 49.5e + e2 = 0 + 235.5

Combine like terms: -235.5 + 235.5 = 0.0
0.0 + 49.5e + e2 = 0 + 235.5
49.5e + e2 = 0 + 235.5

Combine like terms: 0 + 235.5 = 235.5
49.5e + e2 = 235.5

The e term is 49.5e.  Take half its coefficient (24.75).
Square it (612.5625) and add it to both sides.

Add '612.5625' to each side of the equation.
49.5e + 612.5625 + e2 = 235.5 + 612.5625

Reorder the terms:
612.5625 + 49.5e + e2 = 235.5 + 612.5625

Combine like terms: 235.5 + 612.5625 = 848.0625
612.5625 + 49.5e + e2 = 848.0625

Factor a perfect square on the left side:
(e + 24.75)(e + 24.75) = 848.0625

Calculate the square root of the right side: 29.121512667

Break this problem into two subproblems by setting 
(e + 24.75) equal to 29.121512667 and -29.121512667.

Subproblem 1

e + 24.75 = 29.121512667 Simplifying e + 24.75 = 29.121512667 Reorder the terms: 24.75 + e = 29.121512667 Solving 24.75 + e = 29.121512667 Solving for variable 'e'. Move all terms containing e to the left, all other terms to the right. Add '-24.75' to each side of the equation. 24.75 + -24.75 + e = 29.121512667 + -24.75 Combine like terms: 24.75 + -24.75 = 0.00 0.00 + e = 29.121512667 + -24.75 e = 29.121512667 + -24.75 Combine like terms: 29.121512667 + -24.75 = 4.371512667 e = 4.371512667 Simplifying e = 4.371512667

Subproblem 2

e + 24.75 = -29.121512667 Simplifying e + 24.75 = -29.121512667 Reorder the terms: 24.75 + e = -29.121512667 Solving 24.75 + e = -29.121512667 Solving for variable 'e'. Move all terms containing e to the left, all other terms to the right. Add '-24.75' to each side of the equation. 24.75 + -24.75 + e = -29.121512667 + -24.75 Combine like terms: 24.75 + -24.75 = 0.00 0.00 + e = -29.121512667 + -24.75 e = -29.121512667 + -24.75 Combine like terms: -29.121512667 + -24.75 = -53.871512667 e = -53.871512667 Simplifying e = -53.871512667

Solution

The solution to the problem is based on the solutions from the subproblems. e = {4.371512667, -53.871512667}

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