16t^2+25t-7=0

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Solution for 16t^2+25t-7=0 equation:


Simplifying
16t2 + 25t + -7 = 0

Reorder the terms:
-7 + 25t + 16t2 = 0

Solving
-7 + 25t + 16t2 = 0

Solving for variable 't'.

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

Divide each side by '16'.
-0.4375 + 1.5625t + t2 = 0

Move the constant term to the right:

Add '0.4375' to each side of the equation.
-0.4375 + 1.5625t + 0.4375 + t2 = 0 + 0.4375

Reorder the terms:
-0.4375 + 0.4375 + 1.5625t + t2 = 0 + 0.4375

Combine like terms: -0.4375 + 0.4375 = 0.0000
0.0000 + 1.5625t + t2 = 0 + 0.4375
1.5625t + t2 = 0 + 0.4375

Combine like terms: 0 + 0.4375 = 0.4375
1.5625t + t2 = 0.4375

The t term is 1.5625t.  Take half its coefficient (0.78125).
Square it (0.6103515625) and add it to both sides.

Add '0.6103515625' to each side of the equation.
1.5625t + 0.6103515625 + t2 = 0.4375 + 0.6103515625

Reorder the terms:
0.6103515625 + 1.5625t + t2 = 0.4375 + 0.6103515625

Combine like terms: 0.4375 + 0.6103515625 = 1.0478515625
0.6103515625 + 1.5625t + t2 = 1.0478515625

Factor a perfect square on the left side:
(t + 0.78125)(t + 0.78125) = 1.0478515625

Calculate the square root of the right side: 1.02364621

Break this problem into two subproblems by setting 
(t + 0.78125) equal to 1.02364621 and -1.02364621.

Subproblem 1

t + 0.78125 = 1.02364621 Simplifying t + 0.78125 = 1.02364621 Reorder the terms: 0.78125 + t = 1.02364621 Solving 0.78125 + t = 1.02364621 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.78125' to each side of the equation. 0.78125 + -0.78125 + t = 1.02364621 + -0.78125 Combine like terms: 0.78125 + -0.78125 = 0.00000 0.00000 + t = 1.02364621 + -0.78125 t = 1.02364621 + -0.78125 Combine like terms: 1.02364621 + -0.78125 = 0.24239621 t = 0.24239621 Simplifying t = 0.24239621

Subproblem 2

t + 0.78125 = -1.02364621 Simplifying t + 0.78125 = -1.02364621 Reorder the terms: 0.78125 + t = -1.02364621 Solving 0.78125 + t = -1.02364621 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.78125' to each side of the equation. 0.78125 + -0.78125 + t = -1.02364621 + -0.78125 Combine like terms: 0.78125 + -0.78125 = 0.00000 0.00000 + t = -1.02364621 + -0.78125 t = -1.02364621 + -0.78125 Combine like terms: -1.02364621 + -0.78125 = -1.80489621 t = -1.80489621 Simplifying t = -1.80489621

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.24239621, -1.80489621}

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