-t^2+20t+100=

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Solution for -t^2+20t+100= equation:


Simplifying
-1t2 + 20t + 100 = 0

Reorder the terms:
100 + 20t + -1t2 = 0

Solving
100 + 20t + -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'.
-100 + -20t + t2 = 0

Move the constant term to the right:

Add '100' to each side of the equation.
-100 + -20t + 100 + t2 = 0 + 100

Reorder the terms:
-100 + 100 + -20t + t2 = 0 + 100

Combine like terms: -100 + 100 = 0
0 + -20t + t2 = 0 + 100
-20t + t2 = 0 + 100

Combine like terms: 0 + 100 = 100
-20t + t2 = 100

The t term is -20t.  Take half its coefficient (-10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
-20t + 100 + t2 = 100 + 100

Reorder the terms:
100 + -20t + t2 = 100 + 100

Combine like terms: 100 + 100 = 200
100 + -20t + t2 = 200

Factor a perfect square on the left side:
(t + -10)(t + -10) = 200

Calculate the square root of the right side: 14.142135624

Break this problem into two subproblems by setting 
(t + -10) equal to 14.142135624 and -14.142135624.

Subproblem 1

t + -10 = 14.142135624 Simplifying t + -10 = 14.142135624 Reorder the terms: -10 + t = 14.142135624 Solving -10 + t = 14.142135624 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + t = 14.142135624 + 10 Combine like terms: -10 + 10 = 0 0 + t = 14.142135624 + 10 t = 14.142135624 + 10 Combine like terms: 14.142135624 + 10 = 24.142135624 t = 24.142135624 Simplifying t = 24.142135624

Subproblem 2

t + -10 = -14.142135624 Simplifying t + -10 = -14.142135624 Reorder the terms: -10 + t = -14.142135624 Solving -10 + t = -14.142135624 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + t = -14.142135624 + 10 Combine like terms: -10 + 10 = 0 0 + t = -14.142135624 + 10 t = -14.142135624 + 10 Combine like terms: -14.142135624 + 10 = -4.142135624 t = -4.142135624 Simplifying t = -4.142135624

Solution

The solution to the problem is based on the solutions from the subproblems. t = {24.142135624, -4.142135624}

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