-49t^2+21t+1.2=t

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Solution for -49t^2+21t+1.2=t equation:


Simplifying
-49t2 + 21t + 1.2 = t

Reorder the terms:
1.2 + 21t + -49t2 = t

Solving
1.2 + 21t + -49t2 = t

Solving for variable 't'.

Reorder the terms:
1.2 + 21t + -1t + -49t2 = t + -1t

Combine like terms: 21t + -1t = 20t
1.2 + 20t + -49t2 = t + -1t

Combine like terms: t + -1t = 0
1.2 + 20t + -49t2 = 0

Begin completing the square.  Divide all terms by
-49 the coefficient of the squared term: 

Divide each side by '-49'.
-0.02448979592 + -0.4081632653t + t2 = 0

Move the constant term to the right:

Add '0.02448979592' to each side of the equation.
-0.02448979592 + -0.4081632653t + 0.02448979592 + t2 = 0 + 0.02448979592

Reorder the terms:
-0.02448979592 + 0.02448979592 + -0.4081632653t + t2 = 0 + 0.02448979592

Combine like terms: -0.02448979592 + 0.02448979592 = 0.00000000000
0.00000000000 + -0.4081632653t + t2 = 0 + 0.02448979592
-0.4081632653t + t2 = 0 + 0.02448979592

Combine like terms: 0 + 0.02448979592 = 0.02448979592
-0.4081632653t + t2 = 0.02448979592

The t term is -0.4081632653t.  Take half its coefficient (-0.2040816327).
Square it (0.04164931281) and add it to both sides.

Add '0.04164931281' to each side of the equation.
-0.4081632653t + 0.04164931281 + t2 = 0.02448979592 + 0.04164931281

Reorder the terms:
0.04164931281 + -0.4081632653t + t2 = 0.02448979592 + 0.04164931281

Combine like terms: 0.02448979592 + 0.04164931281 = 0.06613910873
0.04164931281 + -0.4081632653t + t2 = 0.06613910873

Factor a perfect square on the left side:
(t + -0.2040816327)(t + -0.2040816327) = 0.06613910873

Calculate the square root of the right side: 0.257175249

Break this problem into two subproblems by setting 
(t + -0.2040816327) equal to 0.257175249 and -0.257175249.

Subproblem 1

t + -0.2040816327 = 0.257175249 Simplifying t + -0.2040816327 = 0.257175249 Reorder the terms: -0.2040816327 + t = 0.257175249 Solving -0.2040816327 + t = 0.257175249 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.2040816327' to each side of the equation. -0.2040816327 + 0.2040816327 + t = 0.257175249 + 0.2040816327 Combine like terms: -0.2040816327 + 0.2040816327 = 0.0000000000 0.0000000000 + t = 0.257175249 + 0.2040816327 t = 0.257175249 + 0.2040816327 Combine like terms: 0.257175249 + 0.2040816327 = 0.4612568817 t = 0.4612568817 Simplifying t = 0.4612568817

Subproblem 2

t + -0.2040816327 = -0.257175249 Simplifying t + -0.2040816327 = -0.257175249 Reorder the terms: -0.2040816327 + t = -0.257175249 Solving -0.2040816327 + t = -0.257175249 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.2040816327' to each side of the equation. -0.2040816327 + 0.2040816327 + t = -0.257175249 + 0.2040816327 Combine like terms: -0.2040816327 + 0.2040816327 = 0.0000000000 0.0000000000 + t = -0.257175249 + 0.2040816327 t = -0.257175249 + 0.2040816327 Combine like terms: -0.257175249 + 0.2040816327 = -0.0530936163 t = -0.0530936163 Simplifying t = -0.0530936163

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.4612568817, -0.0530936163}

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