-14t^2+56t+9=

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Solution for -14t^2+56t+9= equation:


Simplifying
-14t2 + 56t + 9 = 0

Reorder the terms:
9 + 56t + -14t2 = 0

Solving
9 + 56t + -14t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-14 the coefficient of the squared term: 

Divide each side by '-14'.
-0.6428571429 + -4t + t2 = 0

Move the constant term to the right:

Add '0.6428571429' to each side of the equation.
-0.6428571429 + -4t + 0.6428571429 + t2 = 0 + 0.6428571429

Reorder the terms:
-0.6428571429 + 0.6428571429 + -4t + t2 = 0 + 0.6428571429

Combine like terms: -0.6428571429 + 0.6428571429 = 0.0000000000
0.0000000000 + -4t + t2 = 0 + 0.6428571429
-4t + t2 = 0 + 0.6428571429

Combine like terms: 0 + 0.6428571429 = 0.6428571429
-4t + t2 = 0.6428571429

The t term is -4t.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4t + 4 + t2 = 0.6428571429 + 4

Reorder the terms:
4 + -4t + t2 = 0.6428571429 + 4

Combine like terms: 0.6428571429 + 4 = 4.6428571429
4 + -4t + t2 = 4.6428571429

Factor a perfect square on the left side:
(t + -2)(t + -2) = 4.6428571429

Calculate the square root of the right side: 2.154729018

Break this problem into two subproblems by setting 
(t + -2) equal to 2.154729018 and -2.154729018.

Subproblem 1

t + -2 = 2.154729018 Simplifying t + -2 = 2.154729018 Reorder the terms: -2 + t = 2.154729018 Solving -2 + t = 2.154729018 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + t = 2.154729018 + 2 Combine like terms: -2 + 2 = 0 0 + t = 2.154729018 + 2 t = 2.154729018 + 2 Combine like terms: 2.154729018 + 2 = 4.154729018 t = 4.154729018 Simplifying t = 4.154729018

Subproblem 2

t + -2 = -2.154729018 Simplifying t + -2 = -2.154729018 Reorder the terms: -2 + t = -2.154729018 Solving -2 + t = -2.154729018 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + t = -2.154729018 + 2 Combine like terms: -2 + 2 = 0 0 + t = -2.154729018 + 2 t = -2.154729018 + 2 Combine like terms: -2.154729018 + 2 = -0.154729018 t = -0.154729018 Simplifying t = -0.154729018

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.154729018, -0.154729018}

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