4.905*t^2+1.6*t-12=0

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Solution for 4.905*t^2+1.6*t-12=0 equation:


Simplifying
4.905t2 + 1.6t + -12 = 0

Reorder the terms:
-12 + 1.6t + 4.905t2 = 0

Solving
-12 + 1.6t + 4.905t2 = 0

Solving for variable 't'.

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

Divide each side by '4.905'.
-2.44648318 + 0.3261977574t + t2 = 0

Move the constant term to the right:

Add '2.44648318' to each side of the equation.
-2.44648318 + 0.3261977574t + 2.44648318 + t2 = 0 + 2.44648318

Reorder the terms:
-2.44648318 + 2.44648318 + 0.3261977574t + t2 = 0 + 2.44648318

Combine like terms: -2.44648318 + 2.44648318 = 0.00000000
0.00000000 + 0.3261977574t + t2 = 0 + 2.44648318
0.3261977574t + t2 = 0 + 2.44648318

Combine like terms: 0 + 2.44648318 = 2.44648318
0.3261977574t + t2 = 2.44648318

The t term is 0.3261977574t.  Take half its coefficient (0.1630988787).
Square it (0.02660124423) and add it to both sides.

Add '0.02660124423' to each side of the equation.
0.3261977574t + 0.02660124423 + t2 = 2.44648318 + 0.02660124423

Reorder the terms:
0.02660124423 + 0.3261977574t + t2 = 2.44648318 + 0.02660124423

Combine like terms: 2.44648318 + 0.02660124423 = 2.47308442423
0.02660124423 + 0.3261977574t + t2 = 2.47308442423

Factor a perfect square on the left side:
(t + 0.1630988787)(t + 0.1630988787) = 2.47308442423

Calculate the square root of the right side: 1.572604344

Break this problem into two subproblems by setting 
(t + 0.1630988787) equal to 1.572604344 and -1.572604344.

Subproblem 1

t + 0.1630988787 = 1.572604344 Simplifying t + 0.1630988787 = 1.572604344 Reorder the terms: 0.1630988787 + t = 1.572604344 Solving 0.1630988787 + t = 1.572604344 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.1630988787' to each side of the equation. 0.1630988787 + -0.1630988787 + t = 1.572604344 + -0.1630988787 Combine like terms: 0.1630988787 + -0.1630988787 = 0.0000000000 0.0000000000 + t = 1.572604344 + -0.1630988787 t = 1.572604344 + -0.1630988787 Combine like terms: 1.572604344 + -0.1630988787 = 1.4095054653 t = 1.4095054653 Simplifying t = 1.4095054653

Subproblem 2

t + 0.1630988787 = -1.572604344 Simplifying t + 0.1630988787 = -1.572604344 Reorder the terms: 0.1630988787 + t = -1.572604344 Solving 0.1630988787 + t = -1.572604344 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.1630988787' to each side of the equation. 0.1630988787 + -0.1630988787 + t = -1.572604344 + -0.1630988787 Combine like terms: 0.1630988787 + -0.1630988787 = 0.0000000000 0.0000000000 + t = -1.572604344 + -0.1630988787 t = -1.572604344 + -0.1630988787 Combine like terms: -1.572604344 + -0.1630988787 = -1.7357032227 t = -1.7357032227 Simplifying t = -1.7357032227

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.4095054653, -1.7357032227}

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