-4.9*x^2+9.8x=-3

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Solution for -4.9*x^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 = 1.612244898
1 + -2x + x2 = 1.612244898

Factor a perfect square on the left side:
(x + -1)(x + -1) = 1.612244898

Calculate the square root of the right side: 1.26974206

Break this problem into two subproblems by setting 
(x + -1) equal to 1.26974206 and -1.26974206.

Subproblem 1

x + -1 = 1.26974206 Simplifying x + -1 = 1.26974206 Reorder the terms: -1 + x = 1.26974206 Solving -1 + x = 1.26974206 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 = 1.26974206 + 1 Combine like terms: -1 + 1 = 0 0 + x = 1.26974206 + 1 x = 1.26974206 + 1 Combine like terms: 1.26974206 + 1 = 2.26974206 x = 2.26974206 Simplifying x = 2.26974206

Subproblem 2

x + -1 = -1.26974206 Simplifying x + -1 = -1.26974206 Reorder the terms: -1 + x = -1.26974206 Solving -1 + x = -1.26974206 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 = -1.26974206 + 1 Combine like terms: -1 + 1 = 0 0 + x = -1.26974206 + 1 x = -1.26974206 + 1 Combine like terms: -1.26974206 + 1 = -0.26974206 x = -0.26974206 Simplifying x = -0.26974206

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.26974206, -0.26974206}

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