4.9t^2+18t-10=0

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Solution for 4.9t^2+18t-10=0 equation:


Simplifying
4.9t2 + 18t + -10 = 0

Reorder the terms:
-10 + 18t + 4.9t2 = 0

Solving
-10 + 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'.
-2.040816327 + 3.673469388t + t2 = 0

Move the constant term to the right:

Add '2.040816327' to each side of the equation.
-2.040816327 + 3.673469388t + 2.040816327 + t2 = 0 + 2.040816327

Reorder the terms:
-2.040816327 + 2.040816327 + 3.673469388t + t2 = 0 + 2.040816327

Combine like terms: -2.040816327 + 2.040816327 = 0.000000000
0.000000000 + 3.673469388t + t2 = 0 + 2.040816327
3.673469388t + t2 = 0 + 2.040816327

Combine like terms: 0 + 2.040816327 = 2.040816327
3.673469388t + t2 = 2.040816327

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 = 2.040816327 + 3.373594336

Reorder the terms:
3.373594336 + 3.673469388t + t2 = 2.040816327 + 3.373594336

Combine like terms: 2.040816327 + 3.373594336 = 5.414410663
3.373594336 + 3.673469388t + t2 = 5.414410663

Factor a perfect square on the left side:
(t + 1.836734694)(t + 1.836734694) = 5.414410663

Calculate the square root of the right side: 2.326888623

Break this problem into two subproblems by setting 
(t + 1.836734694) equal to 2.326888623 and -2.326888623.

Subproblem 1

t + 1.836734694 = 2.326888623 Simplifying t + 1.836734694 = 2.326888623 Reorder the terms: 1.836734694 + t = 2.326888623 Solving 1.836734694 + t = 2.326888623 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 = 2.326888623 + -1.836734694 Combine like terms: 1.836734694 + -1.836734694 = 0.000000000 0.000000000 + t = 2.326888623 + -1.836734694 t = 2.326888623 + -1.836734694 Combine like terms: 2.326888623 + -1.836734694 = 0.490153929 t = 0.490153929 Simplifying t = 0.490153929

Subproblem 2

t + 1.836734694 = -2.326888623 Simplifying t + 1.836734694 = -2.326888623 Reorder the terms: 1.836734694 + t = -2.326888623 Solving 1.836734694 + t = -2.326888623 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 = -2.326888623 + -1.836734694 Combine like terms: 1.836734694 + -1.836734694 = 0.000000000 0.000000000 + t = -2.326888623 + -1.836734694 t = -2.326888623 + -1.836734694 Combine like terms: -2.326888623 + -1.836734694 = -4.163623317 t = -4.163623317 Simplifying t = -4.163623317

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.490153929, -4.163623317}

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