-4.9t^2+12t+700=0

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Solution for -4.9t^2+12t+700=0 equation:


Simplifying
-4.9t2 + 12t + 700 = 0

Reorder the terms:
700 + 12t + -4.9t2 = 0

Solving
700 + 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'.
-142.8571429 + -2.448979592t + t2 = 0

Move the constant term to the right:

Add '142.8571429' to each side of the equation.
-142.8571429 + -2.448979592t + 142.8571429 + t2 = 0 + 142.8571429

Reorder the terms:
-142.8571429 + 142.8571429 + -2.448979592t + t2 = 0 + 142.8571429

Combine like terms: -142.8571429 + 142.8571429 = 0.0000000
0.0000000 + -2.448979592t + t2 = 0 + 142.8571429
-2.448979592t + t2 = 0 + 142.8571429

Combine like terms: 0 + 142.8571429 = 142.8571429
-2.448979592t + t2 = 142.8571429

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 = 142.8571429 + 1.499375261

Reorder the terms:
1.499375261 + -2.448979592t + t2 = 142.8571429 + 1.499375261

Combine like terms: 142.8571429 + 1.499375261 = 144.356518161
1.499375261 + -2.448979592t + t2 = 144.356518161

Factor a perfect square on the left side:
(t + -1.224489796)(t + -1.224489796) = 144.356518161

Calculate the square root of the right side: 12.01484574

Break this problem into two subproblems by setting 
(t + -1.224489796) equal to 12.01484574 and -12.01484574.

Subproblem 1

t + -1.224489796 = 12.01484574 Simplifying t + -1.224489796 = 12.01484574 Reorder the terms: -1.224489796 + t = 12.01484574 Solving -1.224489796 + t = 12.01484574 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 = 12.01484574 + 1.224489796 Combine like terms: -1.224489796 + 1.224489796 = 0.000000000 0.000000000 + t = 12.01484574 + 1.224489796 t = 12.01484574 + 1.224489796 Combine like terms: 12.01484574 + 1.224489796 = 13.239335536 t = 13.239335536 Simplifying t = 13.239335536

Subproblem 2

t + -1.224489796 = -12.01484574 Simplifying t + -1.224489796 = -12.01484574 Reorder the terms: -1.224489796 + t = -12.01484574 Solving -1.224489796 + t = -12.01484574 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 = -12.01484574 + 1.224489796 Combine like terms: -1.224489796 + 1.224489796 = 0.000000000 0.000000000 + t = -12.01484574 + 1.224489796 t = -12.01484574 + 1.224489796 Combine like terms: -12.01484574 + 1.224489796 = -10.790355944 t = -10.790355944 Simplifying t = -10.790355944

Solution

The solution to the problem is based on the solutions from the subproblems. t = {13.239335536, -10.790355944}

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