x^2=5x+70

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Solution for x^2=5x+70 equation:


Simplifying
x2 = 5x + 70

Reorder the terms:
x2 = 70 + 5x

Solving
x2 = 70 + 5x

Solving for variable 'x'.

Reorder the terms:
-70 + -5x + x2 = 70 + 5x + -70 + -5x

Reorder the terms:
-70 + -5x + x2 = 70 + -70 + 5x + -5x

Combine like terms: 70 + -70 = 0
-70 + -5x + x2 = 0 + 5x + -5x
-70 + -5x + x2 = 5x + -5x

Combine like terms: 5x + -5x = 0
-70 + -5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '70' to each side of the equation.
-70 + -5x + 70 + x2 = 0 + 70

Reorder the terms:
-70 + 70 + -5x + x2 = 0 + 70

Combine like terms: -70 + 70 = 0
0 + -5x + x2 = 0 + 70
-5x + x2 = 0 + 70

Combine like terms: 0 + 70 = 70
-5x + x2 = 70

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = 70 + 6.25

Reorder the terms:
6.25 + -5x + x2 = 70 + 6.25

Combine like terms: 70 + 6.25 = 76.25
6.25 + -5x + x2 = 76.25

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 76.25

Calculate the square root of the right side: 8.732124598

Break this problem into two subproblems by setting 
(x + -2.5) equal to 8.732124598 and -8.732124598.

Subproblem 1

x + -2.5 = 8.732124598 Simplifying x + -2.5 = 8.732124598 Reorder the terms: -2.5 + x = 8.732124598 Solving -2.5 + x = 8.732124598 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 8.732124598 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 8.732124598 + 2.5 x = 8.732124598 + 2.5 Combine like terms: 8.732124598 + 2.5 = 11.232124598 x = 11.232124598 Simplifying x = 11.232124598

Subproblem 2

x + -2.5 = -8.732124598 Simplifying x + -2.5 = -8.732124598 Reorder the terms: -2.5 + x = -8.732124598 Solving -2.5 + x = -8.732124598 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -8.732124598 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -8.732124598 + 2.5 x = -8.732124598 + 2.5 Combine like terms: -8.732124598 + 2.5 = -6.232124598 x = -6.232124598 Simplifying x = -6.232124598

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.232124598, -6.232124598}

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