.2t^2+.17t-.03=0

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Solution for .2t^2+.17t-.03=0 equation:


Simplifying
0.2t2 + 0.17t + -0.03 = 0

Reorder the terms:
-0.03 + 0.17t + 0.2t2 = 0

Solving
-0.03 + 0.17t + 0.2t2 = 0

Solving for variable 't'.

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

Divide each side by '0.2'.
-0.15 + 0.85t + t2 = 0

Move the constant term to the right:

Add '0.15' to each side of the equation.
-0.15 + 0.85t + 0.15 + t2 = 0 + 0.15

Reorder the terms:
-0.15 + 0.15 + 0.85t + t2 = 0 + 0.15

Combine like terms: -0.15 + 0.15 = 0.00
0.00 + 0.85t + t2 = 0 + 0.15
0.85t + t2 = 0 + 0.15

Combine like terms: 0 + 0.15 = 0.15
0.85t + t2 = 0.15

The t term is 0.85t.  Take half its coefficient (0.425).
Square it (0.180625) and add it to both sides.

Add '0.180625' to each side of the equation.
0.85t + 0.180625 + t2 = 0.15 + 0.180625

Reorder the terms:
0.180625 + 0.85t + t2 = 0.15 + 0.180625

Combine like terms: 0.15 + 0.180625 = 0.330625
0.180625 + 0.85t + t2 = 0.330625

Factor a perfect square on the left side:
(t + 0.425)(t + 0.425) = 0.330625

Calculate the square root of the right side: 0.575

Break this problem into two subproblems by setting 
(t + 0.425) equal to 0.575 and -0.575.

Subproblem 1

t + 0.425 = 0.575 Simplifying t + 0.425 = 0.575 Reorder the terms: 0.425 + t = 0.575 Solving 0.425 + t = 0.575 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.425' to each side of the equation. 0.425 + -0.425 + t = 0.575 + -0.425 Combine like terms: 0.425 + -0.425 = 0.000 0.000 + t = 0.575 + -0.425 t = 0.575 + -0.425 Combine like terms: 0.575 + -0.425 = 0.15 t = 0.15 Simplifying t = 0.15

Subproblem 2

t + 0.425 = -0.575 Simplifying t + 0.425 = -0.575 Reorder the terms: 0.425 + t = -0.575 Solving 0.425 + t = -0.575 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.425' to each side of the equation. 0.425 + -0.425 + t = -0.575 + -0.425 Combine like terms: 0.425 + -0.425 = 0.000 0.000 + t = -0.575 + -0.425 t = -0.575 + -0.425 Combine like terms: -0.575 + -0.425 = -1 t = -1 Simplifying t = -1

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.15, -1}

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