-4.9t^2+12t+300=0

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Solution for -4.9t^2+12t+300=0 equation:


Simplifying
-4.9t2 + 12t + 300 = 0

Reorder the terms:
300 + 12t + -4.9t2 = 0

Solving
300 + 12t + -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'.
-61.2244898 + -2.448979592t + t2 = 0

Move the constant term to the right:

Add '61.2244898' to each side of the equation.
-61.2244898 + -2.448979592t + 61.2244898 + t2 = 0 + 61.2244898

Reorder the terms:
-61.2244898 + 61.2244898 + -2.448979592t + t2 = 0 + 61.2244898

Combine like terms: -61.2244898 + 61.2244898 = 0.0000000
0.0000000 + -2.448979592t + t2 = 0 + 61.2244898
-2.448979592t + t2 = 0 + 61.2244898

Combine like terms: 0 + 61.2244898 = 61.2244898
-2.448979592t + t2 = 61.2244898

The t term is -2.448979592t.  Take half its coefficient (-1.224489796).
Square it (1.499375261) and add it to both sides.

Add '1.499375261' to each side of the equation.
-2.448979592t + 1.499375261 + t2 = 61.2244898 + 1.499375261

Reorder the terms:
1.499375261 + -2.448979592t + t2 = 61.2244898 + 1.499375261

Combine like terms: 61.2244898 + 1.499375261 = 62.723865061
1.499375261 + -2.448979592t + t2 = 62.723865061

Factor a perfect square on the left side:
(t + -1.224489796)(t + -1.224489796) = 62.723865061

Calculate the square root of the right side: 7.919839964

Break this problem into two subproblems by setting 
(t + -1.224489796) equal to 7.919839964 and -7.919839964.

Subproblem 1

t + -1.224489796 = 7.919839964 Simplifying t + -1.224489796 = 7.919839964 Reorder the terms: -1.224489796 + t = 7.919839964 Solving -1.224489796 + t = 7.919839964 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.224489796' to each side of the equation. -1.224489796 + 1.224489796 + t = 7.919839964 + 1.224489796 Combine like terms: -1.224489796 + 1.224489796 = 0.000000000 0.000000000 + t = 7.919839964 + 1.224489796 t = 7.919839964 + 1.224489796 Combine like terms: 7.919839964 + 1.224489796 = 9.14432976 t = 9.14432976 Simplifying t = 9.14432976

Subproblem 2

t + -1.224489796 = -7.919839964 Simplifying t + -1.224489796 = -7.919839964 Reorder the terms: -1.224489796 + t = -7.919839964 Solving -1.224489796 + t = -7.919839964 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.224489796' to each side of the equation. -1.224489796 + 1.224489796 + t = -7.919839964 + 1.224489796 Combine like terms: -1.224489796 + 1.224489796 = 0.000000000 0.000000000 + t = -7.919839964 + 1.224489796 t = -7.919839964 + 1.224489796 Combine like terms: -7.919839964 + 1.224489796 = -6.695350168 t = -6.695350168 Simplifying t = -6.695350168

Solution

The solution to the problem is based on the solutions from the subproblems. t = {9.14432976, -6.695350168}

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