4.9t^2-2.9772t-0.28=0

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Solution for 4.9t^2-2.9772t-0.28=0 equation:


Simplifying
4.9t2 + -2.9772t + -0.28 = 0

Reorder the terms:
-0.28 + -2.9772t + 4.9t2 = 0

Solving
-0.28 + -2.9772t + 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'.
-0.05714285714 + -0.6075918367t + t2 = 0

Move the constant term to the right:

Add '0.05714285714' to each side of the equation.
-0.05714285714 + -0.6075918367t + 0.05714285714 + t2 = 0 + 0.05714285714

Reorder the terms:
-0.05714285714 + 0.05714285714 + -0.6075918367t + t2 = 0 + 0.05714285714

Combine like terms: -0.05714285714 + 0.05714285714 = 0.00000000000
0.00000000000 + -0.6075918367t + t2 = 0 + 0.05714285714
-0.6075918367t + t2 = 0 + 0.05714285714

Combine like terms: 0 + 0.05714285714 = 0.05714285714
-0.6075918367t + t2 = 0.05714285714

The t term is -0.6075918367t.  Take half its coefficient (-0.3037959184).
Square it (0.09229196004) and add it to both sides.

Add '0.09229196004' to each side of the equation.
-0.6075918367t + 0.09229196004 + t2 = 0.05714285714 + 0.09229196004

Reorder the terms:
0.09229196004 + -0.6075918367t + t2 = 0.05714285714 + 0.09229196004

Combine like terms: 0.05714285714 + 0.09229196004 = 0.14943481718
0.09229196004 + -0.6075918367t + t2 = 0.14943481718

Factor a perfect square on the left side:
(t + -0.3037959184)(t + -0.3037959184) = 0.14943481718

Calculate the square root of the right side: 0.386567998

Break this problem into two subproblems by setting 
(t + -0.3037959184) equal to 0.386567998 and -0.386567998.

Subproblem 1

t + -0.3037959184 = 0.386567998 Simplifying t + -0.3037959184 = 0.386567998 Reorder the terms: -0.3037959184 + t = 0.386567998 Solving -0.3037959184 + t = 0.386567998 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.3037959184' to each side of the equation. -0.3037959184 + 0.3037959184 + t = 0.386567998 + 0.3037959184 Combine like terms: -0.3037959184 + 0.3037959184 = 0.0000000000 0.0000000000 + t = 0.386567998 + 0.3037959184 t = 0.386567998 + 0.3037959184 Combine like terms: 0.386567998 + 0.3037959184 = 0.6903639164 t = 0.6903639164 Simplifying t = 0.6903639164

Subproblem 2

t + -0.3037959184 = -0.386567998 Simplifying t + -0.3037959184 = -0.386567998 Reorder the terms: -0.3037959184 + t = -0.386567998 Solving -0.3037959184 + t = -0.386567998 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.3037959184' to each side of the equation. -0.3037959184 + 0.3037959184 + t = -0.386567998 + 0.3037959184 Combine like terms: -0.3037959184 + 0.3037959184 = 0.0000000000 0.0000000000 + t = -0.386567998 + 0.3037959184 t = -0.386567998 + 0.3037959184 Combine like terms: -0.386567998 + 0.3037959184 = -0.0827720796 t = -0.0827720796 Simplifying t = -0.0827720796

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.6903639164, -0.0827720796}

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