-5t^2+14t+4=0

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Solution for -5t^2+14t+4=0 equation:


Simplifying
-5t2 + 14t + 4 = 0

Reorder the terms:
4 + 14t + -5t2 = 0

Solving
4 + 14t + -5t2 = 0

Solving for variable 't'.

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

Divide each side by '-5'.
-0.8 + -2.8t + t2 = 0

Move the constant term to the right:

Add '0.8' to each side of the equation.
-0.8 + -2.8t + 0.8 + t2 = 0 + 0.8

Reorder the terms:
-0.8 + 0.8 + -2.8t + t2 = 0 + 0.8

Combine like terms: -0.8 + 0.8 = 0.0
0.0 + -2.8t + t2 = 0 + 0.8
-2.8t + t2 = 0 + 0.8

Combine like terms: 0 + 0.8 = 0.8
-2.8t + t2 = 0.8

The t term is -2.8t.  Take half its coefficient (-1.4).
Square it (1.96) and add it to both sides.

Add '1.96' to each side of the equation.
-2.8t + 1.96 + t2 = 0.8 + 1.96

Reorder the terms:
1.96 + -2.8t + t2 = 0.8 + 1.96

Combine like terms: 0.8 + 1.96 = 2.76
1.96 + -2.8t + t2 = 2.76

Factor a perfect square on the left side:
(t + -1.4)(t + -1.4) = 2.76

Calculate the square root of the right side: 1.661324773

Break this problem into two subproblems by setting 
(t + -1.4) equal to 1.661324773 and -1.661324773.

Subproblem 1

t + -1.4 = 1.661324773 Simplifying t + -1.4 = 1.661324773 Reorder the terms: -1.4 + t = 1.661324773 Solving -1.4 + t = 1.661324773 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.4' to each side of the equation. -1.4 + 1.4 + t = 1.661324773 + 1.4 Combine like terms: -1.4 + 1.4 = 0.0 0.0 + t = 1.661324773 + 1.4 t = 1.661324773 + 1.4 Combine like terms: 1.661324773 + 1.4 = 3.061324773 t = 3.061324773 Simplifying t = 3.061324773

Subproblem 2

t + -1.4 = -1.661324773 Simplifying t + -1.4 = -1.661324773 Reorder the terms: -1.4 + t = -1.661324773 Solving -1.4 + t = -1.661324773 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.4' to each side of the equation. -1.4 + 1.4 + t = -1.661324773 + 1.4 Combine like terms: -1.4 + 1.4 = 0.0 0.0 + t = -1.661324773 + 1.4 t = -1.661324773 + 1.4 Combine like terms: -1.661324773 + 1.4 = -0.261324773 t = -0.261324773 Simplifying t = -0.261324773

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.061324773, -0.261324773}

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