15x^2+1193.4=270x

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Solution for 15x^2+1193.4=270x equation:


Simplifying
15x2 + 1193.4 = 270x

Reorder the terms:
1193.4 + 15x2 = 270x

Solving
1193.4 + 15x2 = 270x

Solving for variable 'x'.

Reorder the terms:
1193.4 + -270x + 15x2 = 270x + -270x

Combine like terms: 270x + -270x = 0
1193.4 + -270x + 15x2 = 0

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

Divide each side by '15'.
79.56 + -18x + x2 = 0

Move the constant term to the right:

Add '-79.56' to each side of the equation.
79.56 + -18x + -79.56 + x2 = 0 + -79.56

Reorder the terms:
79.56 + -79.56 + -18x + x2 = 0 + -79.56

Combine like terms: 79.56 + -79.56 = 0.00
0.00 + -18x + x2 = 0 + -79.56
-18x + x2 = 0 + -79.56

Combine like terms: 0 + -79.56 = -79.56
-18x + x2 = -79.56

The x term is -18x.  Take half its coefficient (-9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
-18x + 81 + x2 = -79.56 + 81

Reorder the terms:
81 + -18x + x2 = -79.56 + 81

Combine like terms: -79.56 + 81 = 1.44
81 + -18x + x2 = 1.44

Factor a perfect square on the left side:
(x + -9)(x + -9) = 1.44

Calculate the square root of the right side: 1.2

Break this problem into two subproblems by setting 
(x + -9) equal to 1.2 and -1.2.

Subproblem 1

x + -9 = 1.2 Simplifying x + -9 = 1.2 Reorder the terms: -9 + x = 1.2 Solving -9 + x = 1.2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + x = 1.2 + 9 Combine like terms: -9 + 9 = 0 0 + x = 1.2 + 9 x = 1.2 + 9 Combine like terms: 1.2 + 9 = 10.2 x = 10.2 Simplifying x = 10.2

Subproblem 2

x + -9 = -1.2 Simplifying x + -9 = -1.2 Reorder the terms: -9 + x = -1.2 Solving -9 + x = -1.2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + x = -1.2 + 9 Combine like terms: -9 + 9 = 0 0 + x = -1.2 + 9 x = -1.2 + 9 Combine like terms: -1.2 + 9 = 7.8 x = 7.8 Simplifying x = 7.8

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.2, 7.8}

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