x^2-16=40x-10

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Solution for x^2-16=40x-10 equation:


Simplifying
x2 + -16 = 40x + -10

Reorder the terms:
-16 + x2 = 40x + -10

Reorder the terms:
-16 + x2 = -10 + 40x

Solving
-16 + x2 = -10 + 40x

Solving for variable 'x'.

Reorder the terms:
-16 + 10 + -40x + x2 = -10 + 40x + 10 + -40x

Combine like terms: -16 + 10 = -6
-6 + -40x + x2 = -10 + 40x + 10 + -40x

Reorder the terms:
-6 + -40x + x2 = -10 + 10 + 40x + -40x

Combine like terms: -10 + 10 = 0
-6 + -40x + x2 = 0 + 40x + -40x
-6 + -40x + x2 = 40x + -40x

Combine like terms: 40x + -40x = 0
-6 + -40x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + -40x + 6 + x2 = 0 + 6

Reorder the terms:
-6 + 6 + -40x + x2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -40x + x2 = 0 + 6
-40x + x2 = 0 + 6

Combine like terms: 0 + 6 = 6
-40x + x2 = 6

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 = 6 + 400

Reorder the terms:
400 + -40x + x2 = 6 + 400

Combine like terms: 6 + 400 = 406
400 + -40x + x2 = 406

Factor a perfect square on the left side:
(x + -20)(x + -20) = 406

Calculate the square root of the right side: 20.14944168

Break this problem into two subproblems by setting 
(x + -20) equal to 20.14944168 and -20.14944168.

Subproblem 1

x + -20 = 20.14944168 Simplifying x + -20 = 20.14944168 Reorder the terms: -20 + x = 20.14944168 Solving -20 + x = 20.14944168 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 = 20.14944168 + 20 Combine like terms: -20 + 20 = 0 0 + x = 20.14944168 + 20 x = 20.14944168 + 20 Combine like terms: 20.14944168 + 20 = 40.14944168 x = 40.14944168 Simplifying x = 40.14944168

Subproblem 2

x + -20 = -20.14944168 Simplifying x + -20 = -20.14944168 Reorder the terms: -20 + x = -20.14944168 Solving -20 + x = -20.14944168 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 = -20.14944168 + 20 Combine like terms: -20 + 20 = 0 0 + x = -20.14944168 + 20 x = -20.14944168 + 20 Combine like terms: -20.14944168 + 20 = -0.14944168 x = -0.14944168 Simplifying x = -0.14944168

Solution

The solution to the problem is based on the solutions from the subproblems. x = {40.14944168, -0.14944168}

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