450=3t+4.9t^2

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Solution for 450=3t+4.9t^2 equation:


Simplifying
450 = 3t + 4.9t2

Solving
450 = 3t + 4.9t2

Solving for variable 't'.

Reorder the terms:
450 + -3t + -4.9t2 = 3t + -3t + 4.9t2 + -4.9t2

Combine like terms: 3t + -3t = 0
450 + -3t + -4.9t2 = 0 + 4.9t2 + -4.9t2
450 + -3t + -4.9t2 = 4.9t2 + -4.9t2

Combine like terms: 4.9t2 + -4.9t2 = 0.0
450 + -3t + -4.9t2 = 0.0

Begin completing the square.  Divide all terms by
-4.9 the coefficient of the squared term: 

Divide each side by '-4.9'.
-91.83673469 + 0.612244898t + t2 = 0

Move the constant term to the right:

Add '91.83673469' to each side of the equation.
-91.83673469 + 0.612244898t + 91.83673469 + t2 = 0 + 91.83673469

Reorder the terms:
-91.83673469 + 91.83673469 + 0.612244898t + t2 = 0 + 91.83673469

Combine like terms: -91.83673469 + 91.83673469 = 0.00000000
0.00000000 + 0.612244898t + t2 = 0 + 91.83673469
0.612244898t + t2 = 0 + 91.83673469

Combine like terms: 0 + 91.83673469 = 91.83673469
0.612244898t + t2 = 91.83673469

The t term is 0.612244898t.  Take half its coefficient (0.306122449).
Square it (0.09371095378) and add it to both sides.

Add '0.09371095378' to each side of the equation.
0.612244898t + 0.09371095378 + t2 = 91.83673469 + 0.09371095378

Reorder the terms:
0.09371095378 + 0.612244898t + t2 = 91.83673469 + 0.09371095378

Combine like terms: 91.83673469 + 0.09371095378 = 91.93044564378
0.09371095378 + 0.612244898t + t2 = 91.93044564378

Factor a perfect square on the left side:
(t + 0.306122449)(t + 0.306122449) = 91.93044564378

Calculate the square root of the right side: 9.58803659

Break this problem into two subproblems by setting 
(t + 0.306122449) equal to 9.58803659 and -9.58803659.

Subproblem 1

t + 0.306122449 = 9.58803659 Simplifying t + 0.306122449 = 9.58803659 Reorder the terms: 0.306122449 + t = 9.58803659 Solving 0.306122449 + t = 9.58803659 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.306122449' to each side of the equation. 0.306122449 + -0.306122449 + t = 9.58803659 + -0.306122449 Combine like terms: 0.306122449 + -0.306122449 = 0.000000000 0.000000000 + t = 9.58803659 + -0.306122449 t = 9.58803659 + -0.306122449 Combine like terms: 9.58803659 + -0.306122449 = 9.281914141 t = 9.281914141 Simplifying t = 9.281914141

Subproblem 2

t + 0.306122449 = -9.58803659 Simplifying t + 0.306122449 = -9.58803659 Reorder the terms: 0.306122449 + t = -9.58803659 Solving 0.306122449 + t = -9.58803659 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.306122449' to each side of the equation. 0.306122449 + -0.306122449 + t = -9.58803659 + -0.306122449 Combine like terms: 0.306122449 + -0.306122449 = 0.000000000 0.000000000 + t = -9.58803659 + -0.306122449 t = -9.58803659 + -0.306122449 Combine like terms: -9.58803659 + -0.306122449 = -9.894159039 t = -9.894159039 Simplifying t = -9.894159039

Solution

The solution to the problem is based on the solutions from the subproblems. t = {9.281914141, -9.894159039}

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