-4.9t^2+18t=10

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


Simplifying
-4.9t2 + 18t = 10

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

Solving
18t + -4.9t2 = 10

Solving for variable 't'.

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

Combine like terms: 10 + -10 = 0
-10 + 18t + -4.9t2 = 0

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 = 1.332778009
3.373594336 + -3.673469388t + t2 = 1.332778009

Factor a perfect square on the left side:
(t + -1.836734694)(t + -1.836734694) = 1.332778009

Calculate the square root of the right side: 1.154460051

Break this problem into two subproblems by setting 
(t + -1.836734694) equal to 1.154460051 and -1.154460051.

Subproblem 1

t + -1.836734694 = 1.154460051 Simplifying t + -1.836734694 = 1.154460051 Reorder the terms: -1.836734694 + t = 1.154460051 Solving -1.836734694 + t = 1.154460051 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 = 1.154460051 + 1.836734694 Combine like terms: -1.836734694 + 1.836734694 = 0.000000000 0.000000000 + t = 1.154460051 + 1.836734694 t = 1.154460051 + 1.836734694 Combine like terms: 1.154460051 + 1.836734694 = 2.991194745 t = 2.991194745 Simplifying t = 2.991194745

Subproblem 2

t + -1.836734694 = -1.154460051 Simplifying t + -1.836734694 = -1.154460051 Reorder the terms: -1.836734694 + t = -1.154460051 Solving -1.836734694 + t = -1.154460051 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 = -1.154460051 + 1.836734694 Combine like terms: -1.836734694 + 1.836734694 = 0.000000000 0.000000000 + t = -1.154460051 + 1.836734694 t = -1.154460051 + 1.836734694 Combine like terms: -1.154460051 + 1.836734694 = 0.682274643 t = 0.682274643 Simplifying t = 0.682274643

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.991194745, 0.682274643}

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