-1014.3-28x+.7x^2=0

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Solution for -1014.3-28x+.7x^2=0 equation:


Simplifying
-1014.3 + -28x + 0.7x2 = 0

Solving
-1014.3 + -28x + 0.7x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.7'.
-1449 + -40x + x2 = 0

Move the constant term to the right:

Add '1449' to each side of the equation.
-1449 + -40x + 1449 + x2 = 0 + 1449

Reorder the terms:
-1449 + 1449 + -40x + x2 = 0 + 1449

Combine like terms: -1449 + 1449 = 0
0 + -40x + x2 = 0 + 1449
-40x + x2 = 0 + 1449

Combine like terms: 0 + 1449 = 1449
-40x + x2 = 1449

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 = 1449 + 400

Reorder the terms:
400 + -40x + x2 = 1449 + 400

Combine like terms: 1449 + 400 = 1849
400 + -40x + x2 = 1849

Factor a perfect square on the left side:
(x + -20)(x + -20) = 1849

Calculate the square root of the right side: 43

Break this problem into two subproblems by setting 
(x + -20) equal to 43 and -43.

Subproblem 1

x + -20 = 43 Simplifying x + -20 = 43 Reorder the terms: -20 + x = 43 Solving -20 + x = 43 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 = 43 + 20 Combine like terms: -20 + 20 = 0 0 + x = 43 + 20 x = 43 + 20 Combine like terms: 43 + 20 = 63 x = 63 Simplifying x = 63

Subproblem 2

x + -20 = -43 Simplifying x + -20 = -43 Reorder the terms: -20 + x = -43 Solving -20 + x = -43 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 = -43 + 20 Combine like terms: -20 + 20 = 0 0 + x = -43 + 20 x = -43 + 20 Combine like terms: -43 + 20 = -23 x = -23 Simplifying x = -23

Solution

The solution to the problem is based on the solutions from the subproblems. x = {63, -23}

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