120=20t+.5(10t^2)

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Solution for 120=20t+.5(10t^2) equation:


Simplifying
120 = 20t + 0.5(10t2)

Remove parenthesis around (10t2)
120 = 20t + 0.5 * 10t2

Multiply 0.5 * 10
120 = 20t + 5t2

Solving
120 = 20t + 5t2

Solving for variable 't'.

Reorder the terms:
120 + -20t + -5t2 = 20t + -20t + 5t2 + -5t2

Combine like terms: 20t + -20t = 0
120 + -20t + -5t2 = 0 + 5t2 + -5t2
120 + -20t + -5t2 = 5t2 + -5t2

Combine like terms: 5t2 + -5t2 = 0
120 + -20t + -5t2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(24 + -4t + -1t2) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(24 + -4t + -1t2)' equal to zero and attempt to solve: Simplifying 24 + -4t + -1t2 = 0 Solving 24 + -4t + -1t2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. -24 + 4t + t2 = 0 Move the constant term to the right: Add '24' to each side of the equation. -24 + 4t + 24 + t2 = 0 + 24 Reorder the terms: -24 + 24 + 4t + t2 = 0 + 24 Combine like terms: -24 + 24 = 0 0 + 4t + t2 = 0 + 24 4t + t2 = 0 + 24 Combine like terms: 0 + 24 = 24 4t + t2 = 24 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 = 24 + 4 Reorder the terms: 4 + 4t + t2 = 24 + 4 Combine like terms: 24 + 4 = 28 4 + 4t + t2 = 28 Factor a perfect square on the left side: (t + 2)(t + 2) = 28 Calculate the square root of the right side: 5.291502622 Break this problem into two subproblems by setting (t + 2) equal to 5.291502622 and -5.291502622.

Subproblem 1

t + 2 = 5.291502622 Simplifying t + 2 = 5.291502622 Reorder the terms: 2 + t = 5.291502622 Solving 2 + t = 5.291502622 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 = 5.291502622 + -2 Combine like terms: 2 + -2 = 0 0 + t = 5.291502622 + -2 t = 5.291502622 + -2 Combine like terms: 5.291502622 + -2 = 3.291502622 t = 3.291502622 Simplifying t = 3.291502622

Subproblem 2

t + 2 = -5.291502622 Simplifying t + 2 = -5.291502622 Reorder the terms: 2 + t = -5.291502622 Solving 2 + t = -5.291502622 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 = -5.291502622 + -2 Combine like terms: 2 + -2 = 0 0 + t = -5.291502622 + -2 t = -5.291502622 + -2 Combine like terms: -5.291502622 + -2 = -7.291502622 t = -7.291502622 Simplifying t = -7.291502622

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.291502622, -7.291502622}

Solution

t = {3.291502622, -7.291502622}

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