4.905t^2+5t-16=0

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Solution for 4.905t^2+5t-16=0 equation:


Simplifying
4.905t2 + 5t + -16 = 0

Reorder the terms:
-16 + 5t + 4.905t2 = 0

Solving
-16 + 5t + 4.905t2 = 0

Solving for variable 't'.

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

Divide each side by '4.905'.
-3.261977574 + 1.019367992t + t2 = 0

Move the constant term to the right:

Add '3.261977574' to each side of the equation.
-3.261977574 + 1.019367992t + 3.261977574 + t2 = 0 + 3.261977574

Reorder the terms:
-3.261977574 + 3.261977574 + 1.019367992t + t2 = 0 + 3.261977574

Combine like terms: -3.261977574 + 3.261977574 = 0.000000000
0.000000000 + 1.019367992t + t2 = 0 + 3.261977574
1.019367992t + t2 = 0 + 3.261977574

Combine like terms: 0 + 3.261977574 = 3.261977574
1.019367992t + t2 = 3.261977574

The t term is 1.019367992t.  Take half its coefficient (0.509683996).
Square it (0.2597777758) and add it to both sides.

Add '0.2597777758' to each side of the equation.
1.019367992t + 0.2597777758 + t2 = 3.261977574 + 0.2597777758

Reorder the terms:
0.2597777758 + 1.019367992t + t2 = 3.261977574 + 0.2597777758

Combine like terms: 3.261977574 + 0.2597777758 = 3.5217553498
0.2597777758 + 1.019367992t + t2 = 3.5217553498

Factor a perfect square on the left side:
(t + 0.509683996)(t + 0.509683996) = 3.5217553498

Calculate the square root of the right side: 1.876634048

Break this problem into two subproblems by setting 
(t + 0.509683996) equal to 1.876634048 and -1.876634048.

Subproblem 1

t + 0.509683996 = 1.876634048 Simplifying t + 0.509683996 = 1.876634048 Reorder the terms: 0.509683996 + t = 1.876634048 Solving 0.509683996 + t = 1.876634048 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.509683996' to each side of the equation. 0.509683996 + -0.509683996 + t = 1.876634048 + -0.509683996 Combine like terms: 0.509683996 + -0.509683996 = 0.000000000 0.000000000 + t = 1.876634048 + -0.509683996 t = 1.876634048 + -0.509683996 Combine like terms: 1.876634048 + -0.509683996 = 1.366950052 t = 1.366950052 Simplifying t = 1.366950052

Subproblem 2

t + 0.509683996 = -1.876634048 Simplifying t + 0.509683996 = -1.876634048 Reorder the terms: 0.509683996 + t = -1.876634048 Solving 0.509683996 + t = -1.876634048 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.509683996' to each side of the equation. 0.509683996 + -0.509683996 + t = -1.876634048 + -0.509683996 Combine like terms: 0.509683996 + -0.509683996 = 0.000000000 0.000000000 + t = -1.876634048 + -0.509683996 t = -1.876634048 + -0.509683996 Combine like terms: -1.876634048 + -0.509683996 = -2.386318044 t = -2.386318044 Simplifying t = -2.386318044

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.366950052, -2.386318044}

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