4.9t^2-18t+8=0

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Solution for 4.9t^2-18t+8=0 equation:


Simplifying
4.9t2 + -18t + 8 = 0

Reorder the terms:
8 + -18t + 4.9t2 = 0

Solving
8 + -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'.
1.632653061 + -3.673469388t + t2 = 0

Move the constant term to the right:

Add '-1.632653061' to each side of the equation.
1.632653061 + -3.673469388t + -1.632653061 + t2 = 0 + -1.632653061

Reorder the terms:
1.632653061 + -1.632653061 + -3.673469388t + t2 = 0 + -1.632653061

Combine like terms: 1.632653061 + -1.632653061 = 0.000000000
0.000000000 + -3.673469388t + t2 = 0 + -1.632653061
-3.673469388t + t2 = 0 + -1.632653061

Combine like terms: 0 + -1.632653061 = -1.632653061
-3.673469388t + t2 = -1.632653061

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 = -1.632653061 + 3.373594336

Reorder the terms:
3.373594336 + -3.673469388t + t2 = -1.632653061 + 3.373594336

Combine like terms: -1.632653061 + 3.373594336 = 1.740941275
3.373594336 + -3.673469388t + t2 = 1.740941275

Factor a perfect square on the left side:
(t + -1.836734694)(t + -1.836734694) = 1.740941275

Calculate the square root of the right side: 1.319447337

Break this problem into two subproblems by setting 
(t + -1.836734694) equal to 1.319447337 and -1.319447337.

Subproblem 1

t + -1.836734694 = 1.319447337 Simplifying t + -1.836734694 = 1.319447337 Reorder the terms: -1.836734694 + t = 1.319447337 Solving -1.836734694 + t = 1.319447337 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 = 1.319447337 + 1.836734694 Combine like terms: -1.836734694 + 1.836734694 = 0.000000000 0.000000000 + t = 1.319447337 + 1.836734694 t = 1.319447337 + 1.836734694 Combine like terms: 1.319447337 + 1.836734694 = 3.156182031 t = 3.156182031 Simplifying t = 3.156182031

Subproblem 2

t + -1.836734694 = -1.319447337 Simplifying t + -1.836734694 = -1.319447337 Reorder the terms: -1.836734694 + t = -1.319447337 Solving -1.836734694 + t = -1.319447337 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 = -1.319447337 + 1.836734694 Combine like terms: -1.836734694 + 1.836734694 = 0.000000000 0.000000000 + t = -1.319447337 + 1.836734694 t = -1.319447337 + 1.836734694 Combine like terms: -1.319447337 + 1.836734694 = 0.517287357 t = 0.517287357 Simplifying t = 0.517287357

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.156182031, 0.517287357}

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