-4.9t^2-10t-15=0

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Solution for -4.9t^2-10t-15=0 equation:


Simplifying
-4.9t2 + -10t + -15 = 0

Reorder the terms:
-15 + -10t + -4.9t2 = 0

Solving
-15 + -10t + -4.9t2 = 0

Solving for variable 't'.

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

Divide each side by '-4.9'.
3.06122449 + 2.040816327t + t2 = 0

Move the constant term to the right:

Add '-3.06122449' to each side of the equation.
3.06122449 + 2.040816327t + -3.06122449 + t2 = 0 + -3.06122449

Reorder the terms:
3.06122449 + -3.06122449 + 2.040816327t + t2 = 0 + -3.06122449

Combine like terms: 3.06122449 + -3.06122449 = 0.00000000
0.00000000 + 2.040816327t + t2 = 0 + -3.06122449
2.040816327t + t2 = 0 + -3.06122449

Combine like terms: 0 + -3.06122449 = -3.06122449
2.040816327t + t2 = -3.06122449

The t term is 2.040816327t.  Take half its coefficient (1.020408164).
Square it (1.041232821) and add it to both sides.

Add '1.041232821' to each side of the equation.
2.040816327t + 1.041232821 + t2 = -3.06122449 + 1.041232821

Reorder the terms:
1.041232821 + 2.040816327t + t2 = -3.06122449 + 1.041232821

Combine like terms: -3.06122449 + 1.041232821 = -2.019991669
1.041232821 + 2.040816327t + t2 = -2.019991669

Factor a perfect square on the left side:
(t + 1.020408164)(t + 1.020408164) = -2.019991669

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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