10x+x^2=17.25

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Solution for 10x+x^2=17.25 equation:


Simplifying
10x + x2 = 17.25

Solving
10x + x2 = 17.25

Solving for variable 'x'.

Reorder the terms:
-17.25 + 10x + x2 = 17.25 + -17.25

Combine like terms: 17.25 + -17.25 = 0.00
-17.25 + 10x + x2 = 0.00

Begin completing the square.

Move the constant term to the right:

Add '17.25' to each side of the equation.
-17.25 + 10x + 17.25 + x2 = 0.00 + 17.25

Reorder the terms:
-17.25 + 17.25 + 10x + x2 = 0.00 + 17.25

Combine like terms: -17.25 + 17.25 = 0.00
0.00 + 10x + x2 = 0.00 + 17.25
10x + x2 = 0.00 + 17.25

Combine like terms: 0.00 + 17.25 = 17.25
10x + x2 = 17.25

The x term is 10x.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10x + 25 + x2 = 17.25 + 25

Reorder the terms:
25 + 10x + x2 = 17.25 + 25

Combine like terms: 17.25 + 25 = 42.25
25 + 10x + x2 = 42.25

Factor a perfect square on the left side:
(x + 5)(x + 5) = 42.25

Calculate the square root of the right side: 6.5

Break this problem into two subproblems by setting 
(x + 5) equal to 6.5 and -6.5.

Subproblem 1

x + 5 = 6.5 Simplifying x + 5 = 6.5 Reorder the terms: 5 + x = 6.5 Solving 5 + x = 6.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 6.5 + -5 Combine like terms: 5 + -5 = 0 0 + x = 6.5 + -5 x = 6.5 + -5 Combine like terms: 6.5 + -5 = 1.5 x = 1.5 Simplifying x = 1.5

Subproblem 2

x + 5 = -6.5 Simplifying x + 5 = -6.5 Reorder the terms: 5 + x = -6.5 Solving 5 + x = -6.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -6.5 + -5 Combine like terms: 5 + -5 = 0 0 + x = -6.5 + -5 x = -6.5 + -5 Combine like terms: -6.5 + -5 = -11.5 x = -11.5 Simplifying x = -11.5

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.5, -11.5}

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