9.8t^2+5.36t-30=0

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Solution for 9.8t^2+5.36t-30=0 equation:


Simplifying
9.8t2 + 5.36t + -30 = 0

Reorder the terms:
-30 + 5.36t + 9.8t2 = 0

Solving
-30 + 5.36t + 9.8t2 = 0

Solving for variable 't'.

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

Divide each side by '9.8'.
-3.06122449 + 0.5469387755t + t2 = 0

Move the constant term to the right:

Add '3.06122449' to each side of the equation.
-3.06122449 + 0.5469387755t + 3.06122449 + t2 = 0 + 3.06122449

Reorder the terms:
-3.06122449 + 3.06122449 + 0.5469387755t + t2 = 0 + 3.06122449

Combine like terms: -3.06122449 + 3.06122449 = 0.00000000
0.00000000 + 0.5469387755t + t2 = 0 + 3.06122449
0.5469387755t + t2 = 0 + 3.06122449

Combine like terms: 0 + 3.06122449 = 3.06122449
0.5469387755t + t2 = 3.06122449

The t term is 0.5469387755t.  Take half its coefficient (0.2734693878).
Square it (0.07478550606) and add it to both sides.

Add '0.07478550606' to each side of the equation.
0.5469387755t + 0.07478550606 + t2 = 3.06122449 + 0.07478550606

Reorder the terms:
0.07478550606 + 0.5469387755t + t2 = 3.06122449 + 0.07478550606

Combine like terms: 3.06122449 + 0.07478550606 = 3.13600999606
0.07478550606 + 0.5469387755t + t2 = 3.13600999606

Factor a perfect square on the left side:
(t + 0.2734693878)(t + 0.2734693878) = 3.13600999606

Calculate the square root of the right side: 1.770878312

Break this problem into two subproblems by setting 
(t + 0.2734693878) equal to 1.770878312 and -1.770878312.

Subproblem 1

t + 0.2734693878 = 1.770878312 Simplifying t + 0.2734693878 = 1.770878312 Reorder the terms: 0.2734693878 + t = 1.770878312 Solving 0.2734693878 + t = 1.770878312 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.2734693878' to each side of the equation. 0.2734693878 + -0.2734693878 + t = 1.770878312 + -0.2734693878 Combine like terms: 0.2734693878 + -0.2734693878 = 0.0000000000 0.0000000000 + t = 1.770878312 + -0.2734693878 t = 1.770878312 + -0.2734693878 Combine like terms: 1.770878312 + -0.2734693878 = 1.4974089242 t = 1.4974089242 Simplifying t = 1.4974089242

Subproblem 2

t + 0.2734693878 = -1.770878312 Simplifying t + 0.2734693878 = -1.770878312 Reorder the terms: 0.2734693878 + t = -1.770878312 Solving 0.2734693878 + t = -1.770878312 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.2734693878' to each side of the equation. 0.2734693878 + -0.2734693878 + t = -1.770878312 + -0.2734693878 Combine like terms: 0.2734693878 + -0.2734693878 = 0.0000000000 0.0000000000 + t = -1.770878312 + -0.2734693878 t = -1.770878312 + -0.2734693878 Combine like terms: -1.770878312 + -0.2734693878 = -2.0443476998 t = -2.0443476998 Simplifying t = -2.0443476998

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.4974089242, -2.0443476998}

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