X*X+40*X=60

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Solution for X*X+40*X=60 equation:


Simplifying
X * X + 40X = 60

Multiply X * X
X2 + 40X = 60

Reorder the terms:
40X + X2 = 60

Solving
40X + X2 = 60

Solving for variable 'X'.

Reorder the terms:
-60 + 40X + X2 = 60 + -60

Combine like terms: 60 + -60 = 0
-60 + 40X + X2 = 0

Begin completing the square.

Move the constant term to the right:

Add '60' to each side of the equation.
-60 + 40X + 60 + X2 = 0 + 60

Reorder the terms:
-60 + 60 + 40X + X2 = 0 + 60

Combine like terms: -60 + 60 = 0
0 + 40X + X2 = 0 + 60
40X + X2 = 0 + 60

Combine like terms: 0 + 60 = 60
40X + X2 = 60

The X term is 40X.  Take half its coefficient (20).
Square it (400) and add it to both sides.

Add '400' to each side of the equation.
40X + 400 + X2 = 60 + 400

Reorder the terms:
400 + 40X + X2 = 60 + 400

Combine like terms: 60 + 400 = 460
400 + 40X + X2 = 460

Factor a perfect square on the left side:
(X + 20)(X + 20) = 460

Calculate the square root of the right side: 21.44761059

Break this problem into two subproblems by setting 
(X + 20) equal to 21.44761059 and -21.44761059.

Subproblem 1

X + 20 = 21.44761059 Simplifying X + 20 = 21.44761059 Reorder the terms: 20 + X = 21.44761059 Solving 20 + X = 21.44761059 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + X = 21.44761059 + -20 Combine like terms: 20 + -20 = 0 0 + X = 21.44761059 + -20 X = 21.44761059 + -20 Combine like terms: 21.44761059 + -20 = 1.44761059 X = 1.44761059 Simplifying X = 1.44761059

Subproblem 2

X + 20 = -21.44761059 Simplifying X + 20 = -21.44761059 Reorder the terms: 20 + X = -21.44761059 Solving 20 + X = -21.44761059 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + X = -21.44761059 + -20 Combine like terms: 20 + -20 = 0 0 + X = -21.44761059 + -20 X = -21.44761059 + -20 Combine like terms: -21.44761059 + -20 = -41.44761059 X = -41.44761059 Simplifying X = -41.44761059

Solution

The solution to the problem is based on the solutions from the subproblems. X = {1.44761059, -41.44761059}

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