-16t^2+39t+324=0

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Solution for -16t^2+39t+324=0 equation:


Simplifying
-16t2 + 39t + 324 = 0

Reorder the terms:
324 + 39t + -16t2 = 0

Solving
324 + 39t + -16t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-16 the coefficient of the squared term: 

Divide each side by '-16'.
-20.25 + -2.4375t + t2 = 0

Move the constant term to the right:

Add '20.25' to each side of the equation.
-20.25 + -2.4375t + 20.25 + t2 = 0 + 20.25

Reorder the terms:
-20.25 + 20.25 + -2.4375t + t2 = 0 + 20.25

Combine like terms: -20.25 + 20.25 = 0.00
0.00 + -2.4375t + t2 = 0 + 20.25
-2.4375t + t2 = 0 + 20.25

Combine like terms: 0 + 20.25 = 20.25
-2.4375t + t2 = 20.25

The t term is -2.4375t.  Take half its coefficient (-1.21875).
Square it (1.485351563) and add it to both sides.

Add '1.485351563' to each side of the equation.
-2.4375t + 1.485351563 + t2 = 20.25 + 1.485351563

Reorder the terms:
1.485351563 + -2.4375t + t2 = 20.25 + 1.485351563

Combine like terms: 20.25 + 1.485351563 = 21.735351563
1.485351563 + -2.4375t + t2 = 21.735351563

Factor a perfect square on the left side:
(t + -1.21875)(t + -1.21875) = 21.735351563

Calculate the square root of the right side: 4.662118785

Break this problem into two subproblems by setting 
(t + -1.21875) equal to 4.662118785 and -4.662118785.

Subproblem 1

t + -1.21875 = 4.662118785 Simplifying t + -1.21875 = 4.662118785 Reorder the terms: -1.21875 + t = 4.662118785 Solving -1.21875 + t = 4.662118785 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.21875' to each side of the equation. -1.21875 + 1.21875 + t = 4.662118785 + 1.21875 Combine like terms: -1.21875 + 1.21875 = 0.00000 0.00000 + t = 4.662118785 + 1.21875 t = 4.662118785 + 1.21875 Combine like terms: 4.662118785 + 1.21875 = 5.880868785 t = 5.880868785 Simplifying t = 5.880868785

Subproblem 2

t + -1.21875 = -4.662118785 Simplifying t + -1.21875 = -4.662118785 Reorder the terms: -1.21875 + t = -4.662118785 Solving -1.21875 + t = -4.662118785 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.21875' to each side of the equation. -1.21875 + 1.21875 + t = -4.662118785 + 1.21875 Combine like terms: -1.21875 + 1.21875 = 0.00000 0.00000 + t = -4.662118785 + 1.21875 t = -4.662118785 + 1.21875 Combine like terms: -4.662118785 + 1.21875 = -3.443368785 t = -3.443368785 Simplifying t = -3.443368785

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.880868785, -3.443368785}

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