19=18t+5t^2

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Solution for 19=18t+5t^2 equation:


Simplifying
19 = 18t + 5t2

Solving
19 = 18t + 5t2

Solving for variable 't'.

Reorder the terms:
19 + -18t + -5t2 = 18t + -18t + 5t2 + -5t2

Combine like terms: 18t + -18t = 0
19 + -18t + -5t2 = 0 + 5t2 + -5t2
19 + -18t + -5t2 = 5t2 + -5t2

Combine like terms: 5t2 + -5t2 = 0
19 + -18t + -5t2 = 0

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
-3.8 + 3.6t + t2 = 0

Move the constant term to the right:

Add '3.8' to each side of the equation.
-3.8 + 3.6t + 3.8 + t2 = 0 + 3.8

Reorder the terms:
-3.8 + 3.8 + 3.6t + t2 = 0 + 3.8

Combine like terms: -3.8 + 3.8 = 0.0
0.0 + 3.6t + t2 = 0 + 3.8
3.6t + t2 = 0 + 3.8

Combine like terms: 0 + 3.8 = 3.8
3.6t + t2 = 3.8

The t term is 3.6t.  Take half its coefficient (1.8).
Square it (3.24) and add it to both sides.

Add '3.24' to each side of the equation.
3.6t + 3.24 + t2 = 3.8 + 3.24

Reorder the terms:
3.24 + 3.6t + t2 = 3.8 + 3.24

Combine like terms: 3.8 + 3.24 = 7.04
3.24 + 3.6t + t2 = 7.04

Factor a perfect square on the left side:
(t + 1.8)(t + 1.8) = 7.04

Calculate the square root of the right side: 2.653299832

Break this problem into two subproblems by setting 
(t + 1.8) equal to 2.653299832 and -2.653299832.

Subproblem 1

t + 1.8 = 2.653299832 Simplifying t + 1.8 = 2.653299832 Reorder the terms: 1.8 + t = 2.653299832 Solving 1.8 + t = 2.653299832 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.8' to each side of the equation. 1.8 + -1.8 + t = 2.653299832 + -1.8 Combine like terms: 1.8 + -1.8 = 0.0 0.0 + t = 2.653299832 + -1.8 t = 2.653299832 + -1.8 Combine like terms: 2.653299832 + -1.8 = 0.853299832 t = 0.853299832 Simplifying t = 0.853299832

Subproblem 2

t + 1.8 = -2.653299832 Simplifying t + 1.8 = -2.653299832 Reorder the terms: 1.8 + t = -2.653299832 Solving 1.8 + t = -2.653299832 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.8' to each side of the equation. 1.8 + -1.8 + t = -2.653299832 + -1.8 Combine like terms: 1.8 + -1.8 = 0.0 0.0 + t = -2.653299832 + -1.8 t = -2.653299832 + -1.8 Combine like terms: -2.653299832 + -1.8 = -4.453299832 t = -4.453299832 Simplifying t = -4.453299832

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.853299832, -4.453299832}

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