t^2+19t-8=0

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Solution for t^2+19t-8=0 equation:


Simplifying
t2 + 19t + -8 = 0

Reorder the terms:
-8 + 19t + t2 = 0

Solving
-8 + 19t + t2 = 0

Solving for variable 't'.

Begin completing the square.

Move the constant term to the right:

Add '8' to each side of the equation.
-8 + 19t + 8 + t2 = 0 + 8

Reorder the terms:
-8 + 8 + 19t + t2 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + 19t + t2 = 0 + 8
19t + t2 = 0 + 8

Combine like terms: 0 + 8 = 8
19t + t2 = 8

The t term is 19t.  Take half its coefficient (9.5).
Square it (90.25) and add it to both sides.

Add '90.25' to each side of the equation.
19t + 90.25 + t2 = 8 + 90.25

Reorder the terms:
90.25 + 19t + t2 = 8 + 90.25

Combine like terms: 8 + 90.25 = 98.25
90.25 + 19t + t2 = 98.25

Factor a perfect square on the left side:
(t + 9.5)(t + 9.5) = 98.25

Calculate the square root of the right side: 9.912113801

Break this problem into two subproblems by setting 
(t + 9.5) equal to 9.912113801 and -9.912113801.

Subproblem 1

t + 9.5 = 9.912113801 Simplifying t + 9.5 = 9.912113801 Reorder the terms: 9.5 + t = 9.912113801 Solving 9.5 + t = 9.912113801 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-9.5' to each side of the equation. 9.5 + -9.5 + t = 9.912113801 + -9.5 Combine like terms: 9.5 + -9.5 = 0.0 0.0 + t = 9.912113801 + -9.5 t = 9.912113801 + -9.5 Combine like terms: 9.912113801 + -9.5 = 0.412113801 t = 0.412113801 Simplifying t = 0.412113801

Subproblem 2

t + 9.5 = -9.912113801 Simplifying t + 9.5 = -9.912113801 Reorder the terms: 9.5 + t = -9.912113801 Solving 9.5 + t = -9.912113801 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-9.5' to each side of the equation. 9.5 + -9.5 + t = -9.912113801 + -9.5 Combine like terms: 9.5 + -9.5 = 0.0 0.0 + t = -9.912113801 + -9.5 t = -9.912113801 + -9.5 Combine like terms: -9.912113801 + -9.5 = -19.412113801 t = -19.412113801 Simplifying t = -19.412113801

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.412113801, -19.412113801}

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