-2t^2+12t+9=24.5

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Solution for -2t^2+12t+9=24.5 equation:


Simplifying
-2t2 + 12t + 9 = 24.5

Reorder the terms:
9 + 12t + -2t2 = 24.5

Solving
9 + 12t + -2t2 = 24.5

Solving for variable 't'.

Reorder the terms:
9 + -24.5 + 12t + -2t2 = 24.5 + -24.5

Combine like terms: 9 + -24.5 = -15.5
-15.5 + 12t + -2t2 = 24.5 + -24.5

Combine like terms: 24.5 + -24.5 = 0.0
-15.5 + 12t + -2t2 = 0.0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
7.75 + -6t + t2 = 0.0

Move the constant term to the right:

Add '-7.75' to each side of the equation.
7.75 + -6t + -7.75 + t2 = 0.0 + -7.75

Reorder the terms:
7.75 + -7.75 + -6t + t2 = 0.0 + -7.75

Combine like terms: 7.75 + -7.75 = 0.00
0.00 + -6t + t2 = 0.0 + -7.75
-6t + t2 = 0.0 + -7.75

Combine like terms: 0.0 + -7.75 = -7.75
-6t + t2 = -7.75

The t term is -6t.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6t + 9 + t2 = -7.75 + 9

Reorder the terms:
9 + -6t + t2 = -7.75 + 9

Combine like terms: -7.75 + 9 = 1.25
9 + -6t + t2 = 1.25

Factor a perfect square on the left side:
(t + -3)(t + -3) = 1.25

Calculate the square root of the right side: 1.118033989

Break this problem into two subproblems by setting 
(t + -3) equal to 1.118033989 and -1.118033989.

Subproblem 1

t + -3 = 1.118033989 Simplifying t + -3 = 1.118033989 Reorder the terms: -3 + t = 1.118033989 Solving -3 + t = 1.118033989 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + t = 1.118033989 + 3 Combine like terms: -3 + 3 = 0 0 + t = 1.118033989 + 3 t = 1.118033989 + 3 Combine like terms: 1.118033989 + 3 = 4.118033989 t = 4.118033989 Simplifying t = 4.118033989

Subproblem 2

t + -3 = -1.118033989 Simplifying t + -3 = -1.118033989 Reorder the terms: -3 + t = -1.118033989 Solving -3 + t = -1.118033989 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + t = -1.118033989 + 3 Combine like terms: -3 + 3 = 0 0 + t = -1.118033989 + 3 t = -1.118033989 + 3 Combine like terms: -1.118033989 + 3 = 1.881966011 t = 1.881966011 Simplifying t = 1.881966011

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.118033989, 1.881966011}

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