t^2+3t-8=0

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Solution for t^2+3t-8=0 equation:


Simplifying
t2 + 3t + -8 = 0

Reorder the terms:
-8 + 3t + t2 = 0

Solving
-8 + 3t + 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 + 3t + 8 + t2 = 0 + 8

Reorder the terms:
-8 + 8 + 3t + t2 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + 3t + t2 = 0 + 8
3t + t2 = 0 + 8

Combine like terms: 0 + 8 = 8
3t + t2 = 8

The t term is 3t.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3t + 2.25 + t2 = 8 + 2.25

Reorder the terms:
2.25 + 3t + t2 = 8 + 2.25

Combine like terms: 8 + 2.25 = 10.25
2.25 + 3t + t2 = 10.25

Factor a perfect square on the left side:
(t + 1.5)(t + 1.5) = 10.25

Calculate the square root of the right side: 3.201562119

Break this problem into two subproblems by setting 
(t + 1.5) equal to 3.201562119 and -3.201562119.

Subproblem 1

t + 1.5 = 3.201562119 Simplifying t + 1.5 = 3.201562119 Reorder the terms: 1.5 + t = 3.201562119 Solving 1.5 + t = 3.201562119 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + t = 3.201562119 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + t = 3.201562119 + -1.5 t = 3.201562119 + -1.5 Combine like terms: 3.201562119 + -1.5 = 1.701562119 t = 1.701562119 Simplifying t = 1.701562119

Subproblem 2

t + 1.5 = -3.201562119 Simplifying t + 1.5 = -3.201562119 Reorder the terms: 1.5 + t = -3.201562119 Solving 1.5 + t = -3.201562119 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + t = -3.201562119 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + t = -3.201562119 + -1.5 t = -3.201562119 + -1.5 Combine like terms: -3.201562119 + -1.5 = -4.701562119 t = -4.701562119 Simplifying t = -4.701562119

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.701562119, -4.701562119}

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