4.9t^2-23t-10=0

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Solution for 4.9t^2-23t-10=0 equation:


Simplifying
4.9t2 + -23t + -10 = 0

Reorder the terms:
-10 + -23t + 4.9t2 = 0

Solving
-10 + -23t + 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 + -4.693877551t + t2 = 0

Move the constant term to the right:

Add '2.040816327' to each side of the equation.
-2.040816327 + -4.693877551t + 2.040816327 + t2 = 0 + 2.040816327

Reorder the terms:
-2.040816327 + 2.040816327 + -4.693877551t + t2 = 0 + 2.040816327

Combine like terms: -2.040816327 + 2.040816327 = 0.000000000
0.000000000 + -4.693877551t + t2 = 0 + 2.040816327
-4.693877551t + t2 = 0 + 2.040816327

Combine like terms: 0 + 2.040816327 = 2.040816327
-4.693877551t + t2 = 2.040816327

The t term is -4.693877551t.  Take half its coefficient (-2.346938776).
Square it (5.508121618) and add it to both sides.

Add '5.508121618' to each side of the equation.
-4.693877551t + 5.508121618 + t2 = 2.040816327 + 5.508121618

Reorder the terms:
5.508121618 + -4.693877551t + t2 = 2.040816327 + 5.508121618

Combine like terms: 2.040816327 + 5.508121618 = 7.548937945
5.508121618 + -4.693877551t + t2 = 7.548937945

Factor a perfect square on the left side:
(t + -2.346938776)(t + -2.346938776) = 7.548937945

Calculate the square root of the right side: 2.747533065

Break this problem into two subproblems by setting 
(t + -2.346938776) equal to 2.747533065 and -2.747533065.

Subproblem 1

t + -2.346938776 = 2.747533065 Simplifying t + -2.346938776 = 2.747533065 Reorder the terms: -2.346938776 + t = 2.747533065 Solving -2.346938776 + t = 2.747533065 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.346938776' to each side of the equation. -2.346938776 + 2.346938776 + t = 2.747533065 + 2.346938776 Combine like terms: -2.346938776 + 2.346938776 = 0.000000000 0.000000000 + t = 2.747533065 + 2.346938776 t = 2.747533065 + 2.346938776 Combine like terms: 2.747533065 + 2.346938776 = 5.094471841 t = 5.094471841 Simplifying t = 5.094471841

Subproblem 2

t + -2.346938776 = -2.747533065 Simplifying t + -2.346938776 = -2.747533065 Reorder the terms: -2.346938776 + t = -2.747533065 Solving -2.346938776 + t = -2.747533065 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.346938776' to each side of the equation. -2.346938776 + 2.346938776 + t = -2.747533065 + 2.346938776 Combine like terms: -2.346938776 + 2.346938776 = 0.000000000 0.000000000 + t = -2.747533065 + 2.346938776 t = -2.747533065 + 2.346938776 Combine like terms: -2.747533065 + 2.346938776 = -0.400594289 t = -0.400594289 Simplifying t = -0.400594289

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.094471841, -0.400594289}

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