-4.9t^2+18t+6=0

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Solution for -4.9t^2+18t+6=0 equation:


Simplifying
-4.9t2 + 18t + 6 = 0

Reorder the terms:
6 + 18t + -4.9t2 = 0

Solving
6 + 18t + -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'.
-1.224489796 + -3.673469388t + t2 = 0

Move the constant term to the right:

Add '1.224489796' to each side of the equation.
-1.224489796 + -3.673469388t + 1.224489796 + t2 = 0 + 1.224489796

Reorder the terms:
-1.224489796 + 1.224489796 + -3.673469388t + t2 = 0 + 1.224489796

Combine like terms: -1.224489796 + 1.224489796 = 0.000000000
0.000000000 + -3.673469388t + t2 = 0 + 1.224489796
-3.673469388t + t2 = 0 + 1.224489796

Combine like terms: 0 + 1.224489796 = 1.224489796
-3.673469388t + t2 = 1.224489796

The t term is -3.673469388t.  Take half its coefficient (-1.836734694).
Square it (3.373594336) and add it to both sides.

Add '3.373594336' to each side of the equation.
-3.673469388t + 3.373594336 + t2 = 1.224489796 + 3.373594336

Reorder the terms:
3.373594336 + -3.673469388t + t2 = 1.224489796 + 3.373594336

Combine like terms: 1.224489796 + 3.373594336 = 4.598084132
3.373594336 + -3.673469388t + t2 = 4.598084132

Factor a perfect square on the left side:
(t + -1.836734694)(t + -1.836734694) = 4.598084132

Calculate the square root of the right side: 2.144314373

Break this problem into two subproblems by setting 
(t + -1.836734694) equal to 2.144314373 and -2.144314373.

Subproblem 1

t + -1.836734694 = 2.144314373 Simplifying t + -1.836734694 = 2.144314373 Reorder the terms: -1.836734694 + t = 2.144314373 Solving -1.836734694 + t = 2.144314373 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.836734694' to each side of the equation. -1.836734694 + 1.836734694 + t = 2.144314373 + 1.836734694 Combine like terms: -1.836734694 + 1.836734694 = 0.000000000 0.000000000 + t = 2.144314373 + 1.836734694 t = 2.144314373 + 1.836734694 Combine like terms: 2.144314373 + 1.836734694 = 3.981049067 t = 3.981049067 Simplifying t = 3.981049067

Subproblem 2

t + -1.836734694 = -2.144314373 Simplifying t + -1.836734694 = -2.144314373 Reorder the terms: -1.836734694 + t = -2.144314373 Solving -1.836734694 + t = -2.144314373 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.836734694' to each side of the equation. -1.836734694 + 1.836734694 + t = -2.144314373 + 1.836734694 Combine like terms: -1.836734694 + 1.836734694 = 0.000000000 0.000000000 + t = -2.144314373 + 1.836734694 t = -2.144314373 + 1.836734694 Combine like terms: -2.144314373 + 1.836734694 = -0.307579679 t = -0.307579679 Simplifying t = -0.307579679

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.981049067, -0.307579679}

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