-4.9t^2+14t+300=0

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Solution for -4.9t^2+14t+300=0 equation:


Simplifying
-4.9t2 + 14t + 300 = 0

Reorder the terms:
300 + 14t + -4.9t2 = 0

Solving
300 + 14t + -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 + -2.857142857t + t2 = 0

Move the constant term to the right:

Add '61.2244898' to each side of the equation.
-61.2244898 + -2.857142857t + 61.2244898 + t2 = 0 + 61.2244898

Reorder the terms:
-61.2244898 + 61.2244898 + -2.857142857t + t2 = 0 + 61.2244898

Combine like terms: -61.2244898 + 61.2244898 = 0.0000000
0.0000000 + -2.857142857t + t2 = 0 + 61.2244898
-2.857142857t + t2 = 0 + 61.2244898

Combine like terms: 0 + 61.2244898 = 61.2244898
-2.857142857t + t2 = 61.2244898

The t term is -2.857142857t.  Take half its coefficient (-1.428571429).
Square it (2.040816328) and add it to both sides.

Add '2.040816328' to each side of the equation.
-2.857142857t + 2.040816328 + t2 = 61.2244898 + 2.040816328

Reorder the terms:
2.040816328 + -2.857142857t + t2 = 61.2244898 + 2.040816328

Combine like terms: 61.2244898 + 2.040816328 = 63.265306128
2.040816328 + -2.857142857t + t2 = 63.265306128

Factor a perfect square on the left side:
(t + -1.428571429)(t + -1.428571429) = 63.265306128

Calculate the square root of the right side: 7.95394909

Break this problem into two subproblems by setting 
(t + -1.428571429) equal to 7.95394909 and -7.95394909.

Subproblem 1

t + -1.428571429 = 7.95394909 Simplifying t + -1.428571429 = 7.95394909 Reorder the terms: -1.428571429 + t = 7.95394909 Solving -1.428571429 + t = 7.95394909 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.428571429' to each side of the equation. -1.428571429 + 1.428571429 + t = 7.95394909 + 1.428571429 Combine like terms: -1.428571429 + 1.428571429 = 0.000000000 0.000000000 + t = 7.95394909 + 1.428571429 t = 7.95394909 + 1.428571429 Combine like terms: 7.95394909 + 1.428571429 = 9.382520519 t = 9.382520519 Simplifying t = 9.382520519

Subproblem 2

t + -1.428571429 = -7.95394909 Simplifying t + -1.428571429 = -7.95394909 Reorder the terms: -1.428571429 + t = -7.95394909 Solving -1.428571429 + t = -7.95394909 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.428571429' to each side of the equation. -1.428571429 + 1.428571429 + t = -7.95394909 + 1.428571429 Combine like terms: -1.428571429 + 1.428571429 = 0.000000000 0.000000000 + t = -7.95394909 + 1.428571429 t = -7.95394909 + 1.428571429 Combine like terms: -7.95394909 + 1.428571429 = -6.525377661 t = -6.525377661 Simplifying t = -6.525377661

Solution

The solution to the problem is based on the solutions from the subproblems. t = {9.382520519, -6.525377661}

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