-t^2+16t+40=0

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Solution for -t^2+16t+40=0 equation:


Simplifying
-1t2 + 16t + 40 = 0

Reorder the terms:
40 + 16t + -1t2 = 0

Solving
40 + 16t + -1t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-40 + -16t + t2 = 0

Move the constant term to the right:

Add '40' to each side of the equation.
-40 + -16t + 40 + t2 = 0 + 40

Reorder the terms:
-40 + 40 + -16t + t2 = 0 + 40

Combine like terms: -40 + 40 = 0
0 + -16t + t2 = 0 + 40
-16t + t2 = 0 + 40

Combine like terms: 0 + 40 = 40
-16t + t2 = 40

The t term is -16t.  Take half its coefficient (-8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
-16t + 64 + t2 = 40 + 64

Reorder the terms:
64 + -16t + t2 = 40 + 64

Combine like terms: 40 + 64 = 104
64 + -16t + t2 = 104

Factor a perfect square on the left side:
(t + -8)(t + -8) = 104

Calculate the square root of the right side: 10.198039027

Break this problem into two subproblems by setting 
(t + -8) equal to 10.198039027 and -10.198039027.

Subproblem 1

t + -8 = 10.198039027 Simplifying t + -8 = 10.198039027 Reorder the terms: -8 + t = 10.198039027 Solving -8 + t = 10.198039027 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + t = 10.198039027 + 8 Combine like terms: -8 + 8 = 0 0 + t = 10.198039027 + 8 t = 10.198039027 + 8 Combine like terms: 10.198039027 + 8 = 18.198039027 t = 18.198039027 Simplifying t = 18.198039027

Subproblem 2

t + -8 = -10.198039027 Simplifying t + -8 = -10.198039027 Reorder the terms: -8 + t = -10.198039027 Solving -8 + t = -10.198039027 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + t = -10.198039027 + 8 Combine like terms: -8 + 8 = 0 0 + t = -10.198039027 + 8 t = -10.198039027 + 8 Combine like terms: -10.198039027 + 8 = -2.198039027 t = -2.198039027 Simplifying t = -2.198039027

Solution

The solution to the problem is based on the solutions from the subproblems. t = {18.198039027, -2.198039027}

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