-4t^2-15t=-14

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Solution for -4t^2-15t=-14 equation:


Simplifying
-4t2 + -15t = -14

Reorder the terms:
-15t + -4t2 = -14

Solving
-15t + -4t2 = -14

Solving for variable 't'.

Reorder the terms:
14 + -15t + -4t2 = -14 + 14

Combine like terms: -14 + 14 = 0
14 + -15t + -4t2 = 0

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

Divide each side by '-4'.
-3.5 + 3.75t + t2 = 0

Move the constant term to the right:

Add '3.5' to each side of the equation.
-3.5 + 3.75t + 3.5 + t2 = 0 + 3.5

Reorder the terms:
-3.5 + 3.5 + 3.75t + t2 = 0 + 3.5

Combine like terms: -3.5 + 3.5 = 0.0
0.0 + 3.75t + t2 = 0 + 3.5
3.75t + t2 = 0 + 3.5

Combine like terms: 0 + 3.5 = 3.5
3.75t + t2 = 3.5

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 = 3.5 + 3.515625

Reorder the terms:
3.515625 + 3.75t + t2 = 3.5 + 3.515625

Combine like terms: 3.5 + 3.515625 = 7.015625
3.515625 + 3.75t + t2 = 7.015625

Factor a perfect square on the left side:
(t + 1.875)(t + 1.875) = 7.015625

Calculate the square root of the right side: 2.648702513

Break this problem into two subproblems by setting 
(t + 1.875) equal to 2.648702513 and -2.648702513.

Subproblem 1

t + 1.875 = 2.648702513 Simplifying t + 1.875 = 2.648702513 Reorder the terms: 1.875 + t = 2.648702513 Solving 1.875 + t = 2.648702513 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 = 2.648702513 + -1.875 Combine like terms: 1.875 + -1.875 = 0.000 0.000 + t = 2.648702513 + -1.875 t = 2.648702513 + -1.875 Combine like terms: 2.648702513 + -1.875 = 0.773702513 t = 0.773702513 Simplifying t = 0.773702513

Subproblem 2

t + 1.875 = -2.648702513 Simplifying t + 1.875 = -2.648702513 Reorder the terms: 1.875 + t = -2.648702513 Solving 1.875 + t = -2.648702513 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 = -2.648702513 + -1.875 Combine like terms: 1.875 + -1.875 = 0.000 0.000 + t = -2.648702513 + -1.875 t = -2.648702513 + -1.875 Combine like terms: -2.648702513 + -1.875 = -4.523702513 t = -4.523702513 Simplifying t = -4.523702513

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.773702513, -4.523702513}

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