-5t^2+12t+14=17

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Solution for -5t^2+12t+14=17 equation:


Simplifying
-5t2 + 12t + 14 = 17

Reorder the terms:
14 + 12t + -5t2 = 17

Solving
14 + 12t + -5t2 = 17

Solving for variable 't'.

Reorder the terms:
14 + -17 + 12t + -5t2 = 17 + -17

Combine like terms: 14 + -17 = -3
-3 + 12t + -5t2 = 17 + -17

Combine like terms: 17 + -17 = 0
-3 + 12t + -5t2 = 0

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
0.6 + -2.4t + t2 = 0

Move the constant term to the right:

Add '-0.6' to each side of the equation.
0.6 + -2.4t + -0.6 + t2 = 0 + -0.6

Reorder the terms:
0.6 + -0.6 + -2.4t + t2 = 0 + -0.6

Combine like terms: 0.6 + -0.6 = 0.0
0.0 + -2.4t + t2 = 0 + -0.6
-2.4t + t2 = 0 + -0.6

Combine like terms: 0 + -0.6 = -0.6
-2.4t + t2 = -0.6

The t term is -2.4t.  Take half its coefficient (-1.2).
Square it (1.44) and add it to both sides.

Add '1.44' to each side of the equation.
-2.4t + 1.44 + t2 = -0.6 + 1.44

Reorder the terms:
1.44 + -2.4t + t2 = -0.6 + 1.44

Combine like terms: -0.6 + 1.44 = 0.84
1.44 + -2.4t + t2 = 0.84

Factor a perfect square on the left side:
(t + -1.2)(t + -1.2) = 0.84

Calculate the square root of the right side: 0.916515139

Break this problem into two subproblems by setting 
(t + -1.2) equal to 0.916515139 and -0.916515139.

Subproblem 1

t + -1.2 = 0.916515139 Simplifying t + -1.2 = 0.916515139 Reorder the terms: -1.2 + t = 0.916515139 Solving -1.2 + t = 0.916515139 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.2' to each side of the equation. -1.2 + 1.2 + t = 0.916515139 + 1.2 Combine like terms: -1.2 + 1.2 = 0.0 0.0 + t = 0.916515139 + 1.2 t = 0.916515139 + 1.2 Combine like terms: 0.916515139 + 1.2 = 2.116515139 t = 2.116515139 Simplifying t = 2.116515139

Subproblem 2

t + -1.2 = -0.916515139 Simplifying t + -1.2 = -0.916515139 Reorder the terms: -1.2 + t = -0.916515139 Solving -1.2 + t = -0.916515139 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.2' to each side of the equation. -1.2 + 1.2 + t = -0.916515139 + 1.2 Combine like terms: -1.2 + 1.2 = 0.0 0.0 + t = -0.916515139 + 1.2 t = -0.916515139 + 1.2 Combine like terms: -0.916515139 + 1.2 = 0.283484861 t = 0.283484861 Simplifying t = 0.283484861

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.116515139, 0.283484861}

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