-10=4t+(-4.905)t^2

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Solution for -10=4t+(-4.905)t^2 equation:


Simplifying
-10 = 4t + (-4.905) * t2

Solving
-10 = 4t + -4.905t2

Solving for variable 't'.

Reorder the terms:
-10 + -4t + 4.905t2 = 4t + -4t + -4.905t2 + 4.905t2

Combine like terms: 4t + -4t = 0
-10 + -4t + 4.905t2 = 0 + -4.905t2 + 4.905t2
-10 + -4t + 4.905t2 = -4.905t2 + 4.905t2

Combine like terms: -4.905t2 + 4.905t2 = 0.000
-10 + -4t + 4.905t2 = 0.000

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

Divide each side by '4.905'.
-2.038735984 + -0.8154943935t + t2 = 0

Move the constant term to the right:

Add '2.038735984' to each side of the equation.
-2.038735984 + -0.8154943935t + 2.038735984 + t2 = 0 + 2.038735984

Reorder the terms:
-2.038735984 + 2.038735984 + -0.8154943935t + t2 = 0 + 2.038735984

Combine like terms: -2.038735984 + 2.038735984 = 0.000000000
0.000000000 + -0.8154943935t + t2 = 0 + 2.038735984
-0.8154943935t + t2 = 0 + 2.038735984

Combine like terms: 0 + 2.038735984 = 2.038735984
-0.8154943935t + t2 = 2.038735984

The t term is -0.8154943935t.  Take half its coefficient (-0.4077471968).
Square it (0.1662577765) and add it to both sides.

Add '0.1662577765' to each side of the equation.
-0.8154943935t + 0.1662577765 + t2 = 2.038735984 + 0.1662577765

Reorder the terms:
0.1662577765 + -0.8154943935t + t2 = 2.038735984 + 0.1662577765

Combine like terms: 2.038735984 + 0.1662577765 = 2.2049937605
0.1662577765 + -0.8154943935t + t2 = 2.2049937605

Factor a perfect square on the left side:
(t + -0.4077471968)(t + -0.4077471968) = 2.2049937605

Calculate the square root of the right side: 1.48492214

Break this problem into two subproblems by setting 
(t + -0.4077471968) equal to 1.48492214 and -1.48492214.

Subproblem 1

t + -0.4077471968 = 1.48492214 Simplifying t + -0.4077471968 = 1.48492214 Reorder the terms: -0.4077471968 + t = 1.48492214 Solving -0.4077471968 + t = 1.48492214 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4077471968' to each side of the equation. -0.4077471968 + 0.4077471968 + t = 1.48492214 + 0.4077471968 Combine like terms: -0.4077471968 + 0.4077471968 = 0.0000000000 0.0000000000 + t = 1.48492214 + 0.4077471968 t = 1.48492214 + 0.4077471968 Combine like terms: 1.48492214 + 0.4077471968 = 1.8926693368 t = 1.8926693368 Simplifying t = 1.8926693368

Subproblem 2

t + -0.4077471968 = -1.48492214 Simplifying t + -0.4077471968 = -1.48492214 Reorder the terms: -0.4077471968 + t = -1.48492214 Solving -0.4077471968 + t = -1.48492214 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4077471968' to each side of the equation. -0.4077471968 + 0.4077471968 + t = -1.48492214 + 0.4077471968 Combine like terms: -0.4077471968 + 0.4077471968 = 0.0000000000 0.0000000000 + t = -1.48492214 + 0.4077471968 t = -1.48492214 + 0.4077471968 Combine like terms: -1.48492214 + 0.4077471968 = -1.0771749432 t = -1.0771749432 Simplifying t = -1.0771749432

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.8926693368, -1.0771749432}

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