4.905t^2+2t=100

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Solution for 4.905t^2+2t=100 equation:


Simplifying
4.905t2 + 2t = 100

Reorder the terms:
2t + 4.905t2 = 100

Solving
2t + 4.905t2 = 100

Solving for variable 't'.

Reorder the terms:
-100 + 2t + 4.905t2 = 100 + -100

Combine like terms: 100 + -100 = 0
-100 + 2t + 4.905t2 = 0

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

Divide each side by '4.905'.
-20.38735984 + 0.4077471967t + t2 = 0

Move the constant term to the right:

Add '20.38735984' to each side of the equation.
-20.38735984 + 0.4077471967t + 20.38735984 + t2 = 0 + 20.38735984

Reorder the terms:
-20.38735984 + 20.38735984 + 0.4077471967t + t2 = 0 + 20.38735984

Combine like terms: -20.38735984 + 20.38735984 = 0.00000000
0.00000000 + 0.4077471967t + t2 = 0 + 20.38735984
0.4077471967t + t2 = 0 + 20.38735984

Combine like terms: 0 + 20.38735984 = 20.38735984
0.4077471967t + t2 = 20.38735984

The t term is 0.4077471967t.  Take half its coefficient (0.2038735984).
Square it (0.04156444412) and add it to both sides.

Add '0.04156444412' to each side of the equation.
0.4077471967t + 0.04156444412 + t2 = 20.38735984 + 0.04156444412

Reorder the terms:
0.04156444412 + 0.4077471967t + t2 = 20.38735984 + 0.04156444412

Combine like terms: 20.38735984 + 0.04156444412 = 20.42892428412
0.04156444412 + 0.4077471967t + t2 = 20.42892428412

Factor a perfect square on the left side:
(t + 0.2038735984)(t + 0.2038735984) = 20.42892428412

Calculate the square root of the right side: 4.519836754

Break this problem into two subproblems by setting 
(t + 0.2038735984) equal to 4.519836754 and -4.519836754.

Subproblem 1

t + 0.2038735984 = 4.519836754 Simplifying t + 0.2038735984 = 4.519836754 Reorder the terms: 0.2038735984 + t = 4.519836754 Solving 0.2038735984 + t = 4.519836754 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.2038735984' to each side of the equation. 0.2038735984 + -0.2038735984 + t = 4.519836754 + -0.2038735984 Combine like terms: 0.2038735984 + -0.2038735984 = 0.0000000000 0.0000000000 + t = 4.519836754 + -0.2038735984 t = 4.519836754 + -0.2038735984 Combine like terms: 4.519836754 + -0.2038735984 = 4.3159631556 t = 4.3159631556 Simplifying t = 4.3159631556

Subproblem 2

t + 0.2038735984 = -4.519836754 Simplifying t + 0.2038735984 = -4.519836754 Reorder the terms: 0.2038735984 + t = -4.519836754 Solving 0.2038735984 + t = -4.519836754 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.2038735984' to each side of the equation. 0.2038735984 + -0.2038735984 + t = -4.519836754 + -0.2038735984 Combine like terms: 0.2038735984 + -0.2038735984 = 0.0000000000 0.0000000000 + t = -4.519836754 + -0.2038735984 t = -4.519836754 + -0.2038735984 Combine like terms: -4.519836754 + -0.2038735984 = -4.7237103524 t = -4.7237103524 Simplifying t = -4.7237103524

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.3159631556, -4.7237103524}

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