4.9t^2-225t+620=0

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Solution for 4.9t^2-225t+620=0 equation:


Simplifying
4.9t2 + -225t + 620 = 0

Reorder the terms:
620 + -225t + 4.9t2 = 0

Solving
620 + -225t + 4.9t2 = 0

Solving for variable 't'.

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

Divide each side by '4.9'.
126.5306122 + -45.91836735t + t2 = 0

Move the constant term to the right:

Add '-126.5306122' to each side of the equation.
126.5306122 + -45.91836735t + -126.5306122 + t2 = 0 + -126.5306122

Reorder the terms:
126.5306122 + -126.5306122 + -45.91836735t + t2 = 0 + -126.5306122

Combine like terms: 126.5306122 + -126.5306122 = 0.0000000
0.0000000 + -45.91836735t + t2 = 0 + -126.5306122
-45.91836735t + t2 = 0 + -126.5306122

Combine like terms: 0 + -126.5306122 = -126.5306122
-45.91836735t + t2 = -126.5306122

The t term is -45.91836735t.  Take half its coefficient (-22.95918368).
Square it (527.1241153) and add it to both sides.

Add '527.1241153' to each side of the equation.
-45.91836735t + 527.1241153 + t2 = -126.5306122 + 527.1241153

Reorder the terms:
527.1241153 + -45.91836735t + t2 = -126.5306122 + 527.1241153

Combine like terms: -126.5306122 + 527.1241153 = 400.5935031
527.1241153 + -45.91836735t + t2 = 400.5935031

Factor a perfect square on the left side:
(t + -22.95918368)(t + -22.95918368) = 400.5935031

Calculate the square root of the right side: 20.014832078

Break this problem into two subproblems by setting 
(t + -22.95918368) equal to 20.014832078 and -20.014832078.

Subproblem 1

t + -22.95918368 = 20.014832078 Simplifying t + -22.95918368 = 20.014832078 Reorder the terms: -22.95918368 + t = 20.014832078 Solving -22.95918368 + t = 20.014832078 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '22.95918368' to each side of the equation. -22.95918368 + 22.95918368 + t = 20.014832078 + 22.95918368 Combine like terms: -22.95918368 + 22.95918368 = 0.00000000 0.00000000 + t = 20.014832078 + 22.95918368 t = 20.014832078 + 22.95918368 Combine like terms: 20.014832078 + 22.95918368 = 42.974015758 t = 42.974015758 Simplifying t = 42.974015758

Subproblem 2

t + -22.95918368 = -20.014832078 Simplifying t + -22.95918368 = -20.014832078 Reorder the terms: -22.95918368 + t = -20.014832078 Solving -22.95918368 + t = -20.014832078 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '22.95918368' to each side of the equation. -22.95918368 + 22.95918368 + t = -20.014832078 + 22.95918368 Combine like terms: -22.95918368 + 22.95918368 = 0.00000000 0.00000000 + t = -20.014832078 + 22.95918368 t = -20.014832078 + 22.95918368 Combine like terms: -20.014832078 + 22.95918368 = 2.944351602 t = 2.944351602 Simplifying t = 2.944351602

Solution

The solution to the problem is based on the solutions from the subproblems. t = {42.974015758, 2.944351602}

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