4.9x^2-9.8x+15=0

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Solution for 4.9x^2-9.8x+15=0 equation:


Simplifying
4.9x2 + -9.8x + 15 = 0

Reorder the terms:
15 + -9.8x + 4.9x2 = 0

Solving
15 + -9.8x + 4.9x2 = 0

Solving for variable 'x'.

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

Divide each side by '4.9'.
3.06122449 + -2x + x2 = 0

Move the constant term to the right:

Add '-3.06122449' to each side of the equation.
3.06122449 + -2x + -3.06122449 + x2 = 0 + -3.06122449

Reorder the terms:
3.06122449 + -3.06122449 + -2x + x2 = 0 + -3.06122449

Combine like terms: 3.06122449 + -3.06122449 = 0.00000000
0.00000000 + -2x + x2 = 0 + -3.06122449
-2x + x2 = 0 + -3.06122449

Combine like terms: 0 + -3.06122449 = -3.06122449
-2x + x2 = -3.06122449

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 = -3.06122449 + 1

Reorder the terms:
1 + -2x + x2 = -3.06122449 + 1

Combine like terms: -3.06122449 + 1 = -2.06122449
1 + -2x + x2 = -2.06122449

Factor a perfect square on the left side:
(x + -1)(x + -1) = -2.06122449

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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