3=8t^2+30t

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Solution for 3=8t^2+30t equation:


Simplifying
3 = 8t2 + 30t

Reorder the terms:
3 = 30t + 8t2

Solving
3 = 30t + 8t2

Solving for variable 't'.

Reorder the terms:
3 + -30t + -8t2 = 30t + -30t + 8t2 + -8t2

Combine like terms: 30t + -30t = 0
3 + -30t + -8t2 = 0 + 8t2 + -8t2
3 + -30t + -8t2 = 8t2 + -8t2

Combine like terms: 8t2 + -8t2 = 0
3 + -30t + -8t2 = 0

Begin completing the square.  Divide all terms by
-8 the coefficient of the squared term: 

Divide each side by '-8'.
-0.375 + 3.75t + t2 = 0

Move the constant term to the right:

Add '0.375' to each side of the equation.
-0.375 + 3.75t + 0.375 + t2 = 0 + 0.375

Reorder the terms:
-0.375 + 0.375 + 3.75t + t2 = 0 + 0.375

Combine like terms: -0.375 + 0.375 = 0.000
0.000 + 3.75t + t2 = 0 + 0.375
3.75t + t2 = 0 + 0.375

Combine like terms: 0 + 0.375 = 0.375
3.75t + t2 = 0.375

The t term is 3.75t.  Take half its coefficient (1.875).
Square it (3.515625) and add it to both sides.

Add '3.515625' to each side of the equation.
3.75t + 3.515625 + t2 = 0.375 + 3.515625

Reorder the terms:
3.515625 + 3.75t + t2 = 0.375 + 3.515625

Combine like terms: 0.375 + 3.515625 = 3.890625
3.515625 + 3.75t + t2 = 3.890625

Factor a perfect square on the left side:
(t + 1.875)(t + 1.875) = 3.890625

Calculate the square root of the right side: 1.97246673

Break this problem into two subproblems by setting 
(t + 1.875) equal to 1.97246673 and -1.97246673.

Subproblem 1

t + 1.875 = 1.97246673 Simplifying t + 1.875 = 1.97246673 Reorder the terms: 1.875 + t = 1.97246673 Solving 1.875 + t = 1.97246673 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.875' to each side of the equation. 1.875 + -1.875 + t = 1.97246673 + -1.875 Combine like terms: 1.875 + -1.875 = 0.000 0.000 + t = 1.97246673 + -1.875 t = 1.97246673 + -1.875 Combine like terms: 1.97246673 + -1.875 = 0.09746673 t = 0.09746673 Simplifying t = 0.09746673

Subproblem 2

t + 1.875 = -1.97246673 Simplifying t + 1.875 = -1.97246673 Reorder the terms: 1.875 + t = -1.97246673 Solving 1.875 + t = -1.97246673 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.875' to each side of the equation. 1.875 + -1.875 + t = -1.97246673 + -1.875 Combine like terms: 1.875 + -1.875 = 0.000 0.000 + t = -1.97246673 + -1.875 t = -1.97246673 + -1.875 Combine like terms: -1.97246673 + -1.875 = -3.84746673 t = -3.84746673 Simplifying t = -3.84746673

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.09746673, -3.84746673}

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