-4.905t^2+12t+25=0

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Solution for -4.905t^2+12t+25=0 equation:


Simplifying
-4.905t2 + 12t + 25 = 0

Reorder the terms:
25 + 12t + -4.905t2 = 0

Solving
25 + 12t + -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'.
-5.096839959 + -2.44648318t + t2 = 0

Move the constant term to the right:

Add '5.096839959' to each side of the equation.
-5.096839959 + -2.44648318t + 5.096839959 + t2 = 0 + 5.096839959

Reorder the terms:
-5.096839959 + 5.096839959 + -2.44648318t + t2 = 0 + 5.096839959

Combine like terms: -5.096839959 + 5.096839959 = 0.000000000
0.000000000 + -2.44648318t + t2 = 0 + 5.096839959
-2.44648318t + t2 = 0 + 5.096839959

Combine like terms: 0 + 5.096839959 = 5.096839959
-2.44648318t + t2 = 5.096839959

The t term is -2.44648318t.  Take half its coefficient (-1.22324159).
Square it (1.496319988) and add it to both sides.

Add '1.496319988' to each side of the equation.
-2.44648318t + 1.496319988 + t2 = 5.096839959 + 1.496319988

Reorder the terms:
1.496319988 + -2.44648318t + t2 = 5.096839959 + 1.496319988

Combine like terms: 5.096839959 + 1.496319988 = 6.593159947
1.496319988 + -2.44648318t + t2 = 6.593159947

Factor a perfect square on the left side:
(t + -1.22324159)(t + -1.22324159) = 6.593159947

Calculate the square root of the right side: 2.567714927

Break this problem into two subproblems by setting 
(t + -1.22324159) equal to 2.567714927 and -2.567714927.

Subproblem 1

t + -1.22324159 = 2.567714927 Simplifying t + -1.22324159 = 2.567714927 Reorder the terms: -1.22324159 + t = 2.567714927 Solving -1.22324159 + t = 2.567714927 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.22324159' to each side of the equation. -1.22324159 + 1.22324159 + t = 2.567714927 + 1.22324159 Combine like terms: -1.22324159 + 1.22324159 = 0.00000000 0.00000000 + t = 2.567714927 + 1.22324159 t = 2.567714927 + 1.22324159 Combine like terms: 2.567714927 + 1.22324159 = 3.790956517 t = 3.790956517 Simplifying t = 3.790956517

Subproblem 2

t + -1.22324159 = -2.567714927 Simplifying t + -1.22324159 = -2.567714927 Reorder the terms: -1.22324159 + t = -2.567714927 Solving -1.22324159 + t = -2.567714927 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.22324159' to each side of the equation. -1.22324159 + 1.22324159 + t = -2.567714927 + 1.22324159 Combine like terms: -1.22324159 + 1.22324159 = 0.00000000 0.00000000 + t = -2.567714927 + 1.22324159 t = -2.567714927 + 1.22324159 Combine like terms: -2.567714927 + 1.22324159 = -1.344473337 t = -1.344473337 Simplifying t = -1.344473337

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.790956517, -1.344473337}

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