-1.75=-4.9x^2+12x

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Solution for -1.75=-4.9x^2+12x equation:


Simplifying
-1.75 = -4.9x2 + 12x

Reorder the terms:
-1.75 = 12x + -4.9x2

Solving
-1.75 = 12x + -4.9x2

Solving for variable 'x'.

Reorder the terms:
-1.75 + -12x + 4.9x2 = 12x + -12x + -4.9x2 + 4.9x2

Combine like terms: 12x + -12x = 0
-1.75 + -12x + 4.9x2 = 0 + -4.9x2 + 4.9x2
-1.75 + -12x + 4.9x2 = -4.9x2 + 4.9x2

Combine like terms: -4.9x2 + 4.9x2 = 0.0
-1.75 + -12x + 4.9x2 = 0.0

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

Divide each side by '4.9'.
-0.3571428571 + -2.448979592x + x2 = 0

Move the constant term to the right:

Add '0.3571428571' to each side of the equation.
-0.3571428571 + -2.448979592x + 0.3571428571 + x2 = 0 + 0.3571428571

Reorder the terms:
-0.3571428571 + 0.3571428571 + -2.448979592x + x2 = 0 + 0.3571428571

Combine like terms: -0.3571428571 + 0.3571428571 = 0.0000000000
0.0000000000 + -2.448979592x + x2 = 0 + 0.3571428571
-2.448979592x + x2 = 0 + 0.3571428571

Combine like terms: 0 + 0.3571428571 = 0.3571428571
-2.448979592x + x2 = 0.3571428571

The x term is -2.448979592x.  Take half its coefficient (-1.224489796).
Square it (1.499375261) and add it to both sides.

Add '1.499375261' to each side of the equation.
-2.448979592x + 1.499375261 + x2 = 0.3571428571 + 1.499375261

Reorder the terms:
1.499375261 + -2.448979592x + x2 = 0.3571428571 + 1.499375261

Combine like terms: 0.3571428571 + 1.499375261 = 1.8565181181
1.499375261 + -2.448979592x + x2 = 1.8565181181

Factor a perfect square on the left side:
(x + -1.224489796)(x + -1.224489796) = 1.8565181181

Calculate the square root of the right side: 1.362541052

Break this problem into two subproblems by setting 
(x + -1.224489796) equal to 1.362541052 and -1.362541052.

Subproblem 1

x + -1.224489796 = 1.362541052 Simplifying x + -1.224489796 = 1.362541052 Reorder the terms: -1.224489796 + x = 1.362541052 Solving -1.224489796 + x = 1.362541052 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.224489796' to each side of the equation. -1.224489796 + 1.224489796 + x = 1.362541052 + 1.224489796 Combine like terms: -1.224489796 + 1.224489796 = 0.000000000 0.000000000 + x = 1.362541052 + 1.224489796 x = 1.362541052 + 1.224489796 Combine like terms: 1.362541052 + 1.224489796 = 2.587030848 x = 2.587030848 Simplifying x = 2.587030848

Subproblem 2

x + -1.224489796 = -1.362541052 Simplifying x + -1.224489796 = -1.362541052 Reorder the terms: -1.224489796 + x = -1.362541052 Solving -1.224489796 + x = -1.362541052 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.224489796' to each side of the equation. -1.224489796 + 1.224489796 + x = -1.362541052 + 1.224489796 Combine like terms: -1.224489796 + 1.224489796 = 0.000000000 0.000000000 + x = -1.362541052 + 1.224489796 x = -1.362541052 + 1.224489796 Combine like terms: -1.362541052 + 1.224489796 = -0.138051256 x = -0.138051256 Simplifying x = -0.138051256

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.587030848, -0.138051256}

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