4.9t^2-4.0669t-0.28=0

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Solution for 4.9t^2-4.0669t-0.28=0 equation:


Simplifying
4.9t2 + -4.0669t + -0.28 = 0

Reorder the terms:
-0.28 + -4.0669t + 4.9t2 = 0

Solving
-0.28 + -4.0669t + 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 + -0.8299795918t + t2 = 0

Move the constant term to the right:

Add '0.05714285714' to each side of the equation.
-0.05714285714 + -0.8299795918t + 0.05714285714 + t2 = 0 + 0.05714285714

Reorder the terms:
-0.05714285714 + 0.05714285714 + -0.8299795918t + t2 = 0 + 0.05714285714

Combine like terms: -0.05714285714 + 0.05714285714 = 0.00000000000
0.00000000000 + -0.8299795918t + t2 = 0 + 0.05714285714
-0.8299795918t + t2 = 0 + 0.05714285714

Combine like terms: 0 + 0.05714285714 = 0.05714285714
-0.8299795918t + t2 = 0.05714285714

The t term is -0.8299795918t.  Take half its coefficient (-0.4149897959).
Square it (0.1722165307) and add it to both sides.

Add '0.1722165307' to each side of the equation.
-0.8299795918t + 0.1722165307 + t2 = 0.05714285714 + 0.1722165307

Reorder the terms:
0.1722165307 + -0.8299795918t + t2 = 0.05714285714 + 0.1722165307

Combine like terms: 0.05714285714 + 0.1722165307 = 0.22935938784
0.1722165307 + -0.8299795918t + t2 = 0.22935938784

Factor a perfect square on the left side:
(t + -0.4149897959)(t + -0.4149897959) = 0.22935938784

Calculate the square root of the right side: 0.478914802

Break this problem into two subproblems by setting 
(t + -0.4149897959) equal to 0.478914802 and -0.478914802.

Subproblem 1

t + -0.4149897959 = 0.478914802 Simplifying t + -0.4149897959 = 0.478914802 Reorder the terms: -0.4149897959 + t = 0.478914802 Solving -0.4149897959 + t = 0.478914802 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4149897959' to each side of the equation. -0.4149897959 + 0.4149897959 + t = 0.478914802 + 0.4149897959 Combine like terms: -0.4149897959 + 0.4149897959 = 0.0000000000 0.0000000000 + t = 0.478914802 + 0.4149897959 t = 0.478914802 + 0.4149897959 Combine like terms: 0.478914802 + 0.4149897959 = 0.8939045979 t = 0.8939045979 Simplifying t = 0.8939045979

Subproblem 2

t + -0.4149897959 = -0.478914802 Simplifying t + -0.4149897959 = -0.478914802 Reorder the terms: -0.4149897959 + t = -0.478914802 Solving -0.4149897959 + t = -0.478914802 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4149897959' to each side of the equation. -0.4149897959 + 0.4149897959 + t = -0.478914802 + 0.4149897959 Combine like terms: -0.4149897959 + 0.4149897959 = 0.0000000000 0.0000000000 + t = -0.478914802 + 0.4149897959 t = -0.478914802 + 0.4149897959 Combine like terms: -0.478914802 + 0.4149897959 = -0.0639250061 t = -0.0639250061 Simplifying t = -0.0639250061

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.8939045979, -0.0639250061}

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