100=5t^2+20t

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Solution for 100=5t^2+20t equation:


Simplifying
100 = 5t2 + 20t

Reorder the terms:
100 = 20t + 5t2

Solving
100 = 20t + 5t2

Solving for variable 't'.

Reorder the terms:
100 + -20t + -5t2 = 20t + -20t + 5t2 + -5t2

Combine like terms: 20t + -20t = 0
100 + -20t + -5t2 = 0 + 5t2 + -5t2
100 + -20t + -5t2 = 5t2 + -5t2

Combine like terms: 5t2 + -5t2 = 0
100 + -20t + -5t2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(20 + -4t + -1t2) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(20 + -4t + -1t2)' equal to zero and attempt to solve: Simplifying 20 + -4t + -1t2 = 0 Solving 20 + -4t + -1t2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. -20 + 4t + t2 = 0 Move the constant term to the right: Add '20' to each side of the equation. -20 + 4t + 20 + t2 = 0 + 20 Reorder the terms: -20 + 20 + 4t + t2 = 0 + 20 Combine like terms: -20 + 20 = 0 0 + 4t + t2 = 0 + 20 4t + t2 = 0 + 20 Combine like terms: 0 + 20 = 20 4t + t2 = 20 The t term is 4t. Take half its coefficient (2). Square it (4) and add it to both sides. Add '4' to each side of the equation. 4t + 4 + t2 = 20 + 4 Reorder the terms: 4 + 4t + t2 = 20 + 4 Combine like terms: 20 + 4 = 24 4 + 4t + t2 = 24 Factor a perfect square on the left side: (t + 2)(t + 2) = 24 Calculate the square root of the right side: 4.898979486 Break this problem into two subproblems by setting (t + 2) equal to 4.898979486 and -4.898979486.

Subproblem 1

t + 2 = 4.898979486 Simplifying t + 2 = 4.898979486 Reorder the terms: 2 + t = 4.898979486 Solving 2 + t = 4.898979486 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + t = 4.898979486 + -2 Combine like terms: 2 + -2 = 0 0 + t = 4.898979486 + -2 t = 4.898979486 + -2 Combine like terms: 4.898979486 + -2 = 2.898979486 t = 2.898979486 Simplifying t = 2.898979486

Subproblem 2

t + 2 = -4.898979486 Simplifying t + 2 = -4.898979486 Reorder the terms: 2 + t = -4.898979486 Solving 2 + t = -4.898979486 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + t = -4.898979486 + -2 Combine like terms: 2 + -2 = 0 0 + t = -4.898979486 + -2 t = -4.898979486 + -2 Combine like terms: -4.898979486 + -2 = -6.898979486 t = -6.898979486 Simplifying t = -6.898979486

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.898979486, -6.898979486}

Solution

t = {2.898979486, -6.898979486}

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