10t^2+16t-9=0

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Solution for 10t^2+16t-9=0 equation:


Simplifying
10t2 + 16t + -9 = 0

Reorder the terms:
-9 + 16t + 10t2 = 0

Solving
-9 + 16t + 10t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
10 the coefficient of the squared term: 

Divide each side by '10'.
-0.9 + 1.6t + t2 = 0

Move the constant term to the right:

Add '0.9' to each side of the equation.
-0.9 + 1.6t + 0.9 + t2 = 0 + 0.9

Reorder the terms:
-0.9 + 0.9 + 1.6t + t2 = 0 + 0.9

Combine like terms: -0.9 + 0.9 = 0.0
0.0 + 1.6t + t2 = 0 + 0.9
1.6t + t2 = 0 + 0.9

Combine like terms: 0 + 0.9 = 0.9
1.6t + t2 = 0.9

The t term is 1.6t.  Take half its coefficient (0.8).
Square it (0.64) and add it to both sides.

Add '0.64' to each side of the equation.
1.6t + 0.64 + t2 = 0.9 + 0.64

Reorder the terms:
0.64 + 1.6t + t2 = 0.9 + 0.64

Combine like terms: 0.9 + 0.64 = 1.54
0.64 + 1.6t + t2 = 1.54

Factor a perfect square on the left side:
(t + 0.8)(t + 0.8) = 1.54

Calculate the square root of the right side: 1.240967365

Break this problem into two subproblems by setting 
(t + 0.8) equal to 1.240967365 and -1.240967365.

Subproblem 1

t + 0.8 = 1.240967365 Simplifying t + 0.8 = 1.240967365 Reorder the terms: 0.8 + t = 1.240967365 Solving 0.8 + t = 1.240967365 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + t = 1.240967365 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + t = 1.240967365 + -0.8 t = 1.240967365 + -0.8 Combine like terms: 1.240967365 + -0.8 = 0.440967365 t = 0.440967365 Simplifying t = 0.440967365

Subproblem 2

t + 0.8 = -1.240967365 Simplifying t + 0.8 = -1.240967365 Reorder the terms: 0.8 + t = -1.240967365 Solving 0.8 + t = -1.240967365 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + t = -1.240967365 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + t = -1.240967365 + -0.8 t = -1.240967365 + -0.8 Combine like terms: -1.240967365 + -0.8 = -2.040967365 t = -2.040967365 Simplifying t = -2.040967365

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.440967365, -2.040967365}

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