5t-4.9t^2=-1.8

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Solution for 5t-4.9t^2=-1.8 equation:


Simplifying
5t + -4.9t2 = -1.8

Solving
5t + -4.9t2 = -1.8

Solving for variable 't'.

Reorder the terms:
1.8 + 5t + -4.9t2 = -1.8 + 1.8

Combine like terms: -1.8 + 1.8 = 0.0
1.8 + 5t + -4.9t2 = 0.0

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

Divide each side by '-4.9'.
-0.3673469388 + -1.020408163t + t2 = 0

Move the constant term to the right:

Add '0.3673469388' to each side of the equation.
-0.3673469388 + -1.020408163t + 0.3673469388 + t2 = 0 + 0.3673469388

Reorder the terms:
-0.3673469388 + 0.3673469388 + -1.020408163t + t2 = 0 + 0.3673469388

Combine like terms: -0.3673469388 + 0.3673469388 = 0.0000000000
0.0000000000 + -1.020408163t + t2 = 0 + 0.3673469388
-1.020408163t + t2 = 0 + 0.3673469388

Combine like terms: 0 + 0.3673469388 = 0.3673469388
-1.020408163t + t2 = 0.3673469388

The t term is -1.020408163t.  Take half its coefficient (-0.5102040815).
Square it (0.2603082048) and add it to both sides.

Add '0.2603082048' to each side of the equation.
-1.020408163t + 0.2603082048 + t2 = 0.3673469388 + 0.2603082048

Reorder the terms:
0.2603082048 + -1.020408163t + t2 = 0.3673469388 + 0.2603082048

Combine like terms: 0.3673469388 + 0.2603082048 = 0.6276551436
0.2603082048 + -1.020408163t + t2 = 0.6276551436

Factor a perfect square on the left side:
(t + -0.5102040815)(t + -0.5102040815) = 0.6276551436

Calculate the square root of the right side: 0.792246896

Break this problem into two subproblems by setting 
(t + -0.5102040815) equal to 0.792246896 and -0.792246896.

Subproblem 1

t + -0.5102040815 = 0.792246896 Simplifying t + -0.5102040815 = 0.792246896 Reorder the terms: -0.5102040815 + t = 0.792246896 Solving -0.5102040815 + t = 0.792246896 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.5102040815' to each side of the equation. -0.5102040815 + 0.5102040815 + t = 0.792246896 + 0.5102040815 Combine like terms: -0.5102040815 + 0.5102040815 = 0.0000000000 0.0000000000 + t = 0.792246896 + 0.5102040815 t = 0.792246896 + 0.5102040815 Combine like terms: 0.792246896 + 0.5102040815 = 1.3024509775 t = 1.3024509775 Simplifying t = 1.3024509775

Subproblem 2

t + -0.5102040815 = -0.792246896 Simplifying t + -0.5102040815 = -0.792246896 Reorder the terms: -0.5102040815 + t = -0.792246896 Solving -0.5102040815 + t = -0.792246896 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.5102040815' to each side of the equation. -0.5102040815 + 0.5102040815 + t = -0.792246896 + 0.5102040815 Combine like terms: -0.5102040815 + 0.5102040815 = 0.0000000000 0.0000000000 + t = -0.792246896 + 0.5102040815 t = -0.792246896 + 0.5102040815 Combine like terms: -0.792246896 + 0.5102040815 = -0.2820428145 t = -0.2820428145 Simplifying t = -0.2820428145

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.3024509775, -0.2820428145}

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