-4.9x^2+9.8x=3

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Solution for -4.9x^2+9.8x=3 equation:


Simplifying
-4.9x2 + 9.8x = 3

Reorder the terms:
9.8x + -4.9x2 = 3

Solving
9.8x + -4.9x2 = 3

Solving for variable 'x'.

Reorder the terms:
-3 + 9.8x + -4.9x2 = 3 + -3

Combine like terms: 3 + -3 = 0
-3 + 9.8x + -4.9x2 = 0

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

Divide each side by '-4.9'.
0.612244898 + -2x + x2 = 0

Move the constant term to the right:

Add '-0.612244898' to each side of the equation.
0.612244898 + -2x + -0.612244898 + x2 = 0 + -0.612244898

Reorder the terms:
0.612244898 + -0.612244898 + -2x + x2 = 0 + -0.612244898

Combine like terms: 0.612244898 + -0.612244898 = 0.000000000
0.000000000 + -2x + x2 = 0 + -0.612244898
-2x + x2 = 0 + -0.612244898

Combine like terms: 0 + -0.612244898 = -0.612244898
-2x + x2 = -0.612244898

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = -0.612244898 + 1

Reorder the terms:
1 + -2x + x2 = -0.612244898 + 1

Combine like terms: -0.612244898 + 1 = 0.387755102
1 + -2x + x2 = 0.387755102

Factor a perfect square on the left side:
(x + -1)(x + -1) = 0.387755102

Calculate the square root of the right side: 0.622699849

Break this problem into two subproblems by setting 
(x + -1) equal to 0.622699849 and -0.622699849.

Subproblem 1

x + -1 = 0.622699849 Simplifying x + -1 = 0.622699849 Reorder the terms: -1 + x = 0.622699849 Solving -1 + x = 0.622699849 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 0.622699849 + 1 Combine like terms: -1 + 1 = 0 0 + x = 0.622699849 + 1 x = 0.622699849 + 1 Combine like terms: 0.622699849 + 1 = 1.622699849 x = 1.622699849 Simplifying x = 1.622699849

Subproblem 2

x + -1 = -0.622699849 Simplifying x + -1 = -0.622699849 Reorder the terms: -1 + x = -0.622699849 Solving -1 + x = -0.622699849 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -0.622699849 + 1 Combine like terms: -1 + 1 = 0 0 + x = -0.622699849 + 1 x = -0.622699849 + 1 Combine like terms: -0.622699849 + 1 = 0.377300151 x = 0.377300151 Simplifying x = 0.377300151

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.622699849, 0.377300151}

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