100=(-4.9t^2)+49t+1.5

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Solution for 100=(-4.9t^2)+49t+1.5 equation:


Simplifying
100 = (-4.9t2) + 49t + 1.5

Reorder the terms:
100 = 1.5 + 49t + (-4.9t2)

Solving
100 = 1.5 + 49t + (-4.9t2)

Solving for variable 't'.

Combine like terms: 100 + -1.5 = 98.5
98.5 + -49t + (4.9t2) = 1.5 + 49t + (-4.9t2) + -1.5 + -49t + (4.9t2)

Reorder the terms:
98.5 + -49t + (4.9t2) = 1.5 + -1.5 + 49t + -49t + (-4.9t2) + (4.9t2)

Combine like terms: 1.5 + -1.5 = 0.0
98.5 + -49t + (4.9t2) = 0.0 + 49t + -49t + (-4.9t2) + (4.9t2)
98.5 + -49t + (4.9t2) = 49t + -49t + (-4.9t2) + (4.9t2)

Combine like terms: 49t + -49t = 0
98.5 + -49t + (4.9t2) = 0 + (-4.9t2) + (4.9t2)
98.5 + -49t + (4.9t2) = (-4.9t2) + (4.9t2)

Combine like terms: (-4.9t2) + (4.9t2) = 0.0
98.5 + -49t + (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'.
20.10204082 + -10t + t2 = 0

Move the constant term to the right:

Add '-20.10204082' to each side of the equation.
20.10204082 + -10t + -20.10204082 + t2 = 0 + -20.10204082

Reorder the terms:
20.10204082 + -20.10204082 + -10t + t2 = 0 + -20.10204082

Combine like terms: 20.10204082 + -20.10204082 = 0.00000000
0.00000000 + -10t + t2 = 0 + -20.10204082
-10t + t2 = 0 + -20.10204082

Combine like terms: 0 + -20.10204082 = -20.10204082
-10t + t2 = -20.10204082

The t term is -10t.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10t + 25 + t2 = -20.10204082 + 25

Reorder the terms:
25 + -10t + t2 = -20.10204082 + 25

Combine like terms: -20.10204082 + 25 = 4.89795918
25 + -10t + t2 = 4.89795918

Factor a perfect square on the left side:
((t) + -5)((t) + -5) = 4.89795918

Calculate the square root of the right side: 2.21313334

Break this problem into two subproblems by setting 
((t) + -5) equal to 2.21313334 and -2.21313334.

Subproblem 1

(t) + -5 = 2.21313334 Simplifying (t) + -5 = 2.21313334 t + -5 = 2.21313334 Reorder the terms: -5 + t = 2.21313334 Solving -5 + t = 2.21313334 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + t = 2.21313334 + 5 Combine like terms: -5 + 5 = 0 0 + t = 2.21313334 + 5 t = 2.21313334 + 5 Combine like terms: 2.21313334 + 5 = 7.21313334 t = 7.21313334 Simplifying t = 7.21313334

Subproblem 2

(t) + -5 = -2.21313334 Simplifying (t) + -5 = -2.21313334 t + -5 = -2.21313334 Reorder the terms: -5 + t = -2.21313334 Solving -5 + t = -2.21313334 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + t = -2.21313334 + 5 Combine like terms: -5 + 5 = 0 0 + t = -2.21313334 + 5 t = -2.21313334 + 5 Combine like terms: -2.21313334 + 5 = 2.78686666 t = 2.78686666 Simplifying t = 2.78686666

Solution

The solution to the problem is based on the solutions from the subproblems. t = {7.21313334, 2.78686666}

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