4t^2+11t=12

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Solution for 4t^2+11t=12 equation:


Simplifying
4t2 + 11t = 12

Reorder the terms:
11t + 4t2 = 12

Solving
11t + 4t2 = 12

Solving for variable 't'.

Reorder the terms:
-12 + 11t + 4t2 = 12 + -12

Combine like terms: 12 + -12 = 0
-12 + 11t + 4t2 = 0

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

Divide each side by '4'.
-3 + 2.75t + t2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + 2.75t + 3 + t2 = 0 + 3

Reorder the terms:
-3 + 3 + 2.75t + t2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 2.75t + t2 = 0 + 3
2.75t + t2 = 0 + 3

Combine like terms: 0 + 3 = 3
2.75t + t2 = 3

The t term is 2.75t.  Take half its coefficient (1.375).
Square it (1.890625) and add it to both sides.

Add '1.890625' to each side of the equation.
2.75t + 1.890625 + t2 = 3 + 1.890625

Reorder the terms:
1.890625 + 2.75t + t2 = 3 + 1.890625

Combine like terms: 3 + 1.890625 = 4.890625
1.890625 + 2.75t + t2 = 4.890625

Factor a perfect square on the left side:
(t + 1.375)(t + 1.375) = 4.890625

Calculate the square root of the right side: 2.211475752

Break this problem into two subproblems by setting 
(t + 1.375) equal to 2.211475752 and -2.211475752.

Subproblem 1

t + 1.375 = 2.211475752 Simplifying t + 1.375 = 2.211475752 Reorder the terms: 1.375 + t = 2.211475752 Solving 1.375 + t = 2.211475752 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.375' to each side of the equation. 1.375 + -1.375 + t = 2.211475752 + -1.375 Combine like terms: 1.375 + -1.375 = 0.000 0.000 + t = 2.211475752 + -1.375 t = 2.211475752 + -1.375 Combine like terms: 2.211475752 + -1.375 = 0.836475752 t = 0.836475752 Simplifying t = 0.836475752

Subproblem 2

t + 1.375 = -2.211475752 Simplifying t + 1.375 = -2.211475752 Reorder the terms: 1.375 + t = -2.211475752 Solving 1.375 + t = -2.211475752 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.375' to each side of the equation. 1.375 + -1.375 + t = -2.211475752 + -1.375 Combine like terms: 1.375 + -1.375 = 0.000 0.000 + t = -2.211475752 + -1.375 t = -2.211475752 + -1.375 Combine like terms: -2.211475752 + -1.375 = -3.586475752 t = -3.586475752 Simplifying t = -3.586475752

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.836475752, -3.586475752}

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