-9.8x^2+26x+1200=0

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Solution for -9.8x^2+26x+1200=0 equation:


Simplifying
-9.8x2 + 26x + 1200 = 0

Reorder the terms:
1200 + 26x + -9.8x2 = 0

Solving
1200 + 26x + -9.8x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-9.8 the coefficient of the squared term: 

Divide each side by '-9.8'.
-122.4489796 + -2.653061224x + x2 = 0

Move the constant term to the right:

Add '122.4489796' to each side of the equation.
-122.4489796 + -2.653061224x + 122.4489796 + x2 = 0 + 122.4489796

Reorder the terms:
-122.4489796 + 122.4489796 + -2.653061224x + x2 = 0 + 122.4489796

Combine like terms: -122.4489796 + 122.4489796 = 0.0000000
0.0000000 + -2.653061224x + x2 = 0 + 122.4489796
-2.653061224x + x2 = 0 + 122.4489796

Combine like terms: 0 + 122.4489796 = 122.4489796
-2.653061224x + x2 = 122.4489796

The x term is -2.653061224x.  Take half its coefficient (-1.326530612).
Square it (1.759683465) and add it to both sides.

Add '1.759683465' to each side of the equation.
-2.653061224x + 1.759683465 + x2 = 122.4489796 + 1.759683465

Reorder the terms:
1.759683465 + -2.653061224x + x2 = 122.4489796 + 1.759683465

Combine like terms: 122.4489796 + 1.759683465 = 124.208663065
1.759683465 + -2.653061224x + x2 = 124.208663065

Factor a perfect square on the left side:
(x + -1.326530612)(x + -1.326530612) = 124.208663065

Calculate the square root of the right side: 11.144894036

Break this problem into two subproblems by setting 
(x + -1.326530612) equal to 11.144894036 and -11.144894036.

Subproblem 1

x + -1.326530612 = 11.144894036 Simplifying x + -1.326530612 = 11.144894036 Reorder the terms: -1.326530612 + x = 11.144894036 Solving -1.326530612 + x = 11.144894036 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.326530612' to each side of the equation. -1.326530612 + 1.326530612 + x = 11.144894036 + 1.326530612 Combine like terms: -1.326530612 + 1.326530612 = 0.000000000 0.000000000 + x = 11.144894036 + 1.326530612 x = 11.144894036 + 1.326530612 Combine like terms: 11.144894036 + 1.326530612 = 12.471424648 x = 12.471424648 Simplifying x = 12.471424648

Subproblem 2

x + -1.326530612 = -11.144894036 Simplifying x + -1.326530612 = -11.144894036 Reorder the terms: -1.326530612 + x = -11.144894036 Solving -1.326530612 + x = -11.144894036 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.326530612' to each side of the equation. -1.326530612 + 1.326530612 + x = -11.144894036 + 1.326530612 Combine like terms: -1.326530612 + 1.326530612 = 0.000000000 0.000000000 + x = -11.144894036 + 1.326530612 x = -11.144894036 + 1.326530612 Combine like terms: -11.144894036 + 1.326530612 = -9.818363424 x = -9.818363424 Simplifying x = -9.818363424

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.471424648, -9.818363424}

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