8t^2+8t-7=0

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Solution for 8t^2+8t-7=0 equation:


Simplifying
8t2 + 8t + -7 = 0

Reorder the terms:
-7 + 8t + 8t2 = 0

Solving
-7 + 8t + 8t2 = 0

Solving for variable 't'.

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

Divide each side by '8'.
-0.875 + t + t2 = 0

Move the constant term to the right:

Add '0.875' to each side of the equation.
-0.875 + t + 0.875 + t2 = 0 + 0.875

Reorder the terms:
-0.875 + 0.875 + t + t2 = 0 + 0.875

Combine like terms: -0.875 + 0.875 = 0.000
0.000 + t + t2 = 0 + 0.875
t + t2 = 0 + 0.875

Combine like terms: 0 + 0.875 = 0.875
t + t2 = 0.875

The t term is t.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + t2 = 0.875 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + t2 = 0.875 + 0.25

Combine like terms: 0.875 + 0.25 = 1.125
1.25 + t2 = 1.125

Factor a perfect square on the left side:
(t + 0.5)(t + 0.5) = 1.125

Calculate the square root of the right side: 1.060660172

Break this problem into two subproblems by setting 
(t + 0.5) equal to 1.060660172 and -1.060660172.

Subproblem 1

t + 0.5 = 1.060660172 Simplifying t + 0.5 = 1.060660172 Reorder the terms: 0.5 + t = 1.060660172 Solving 0.5 + t = 1.060660172 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + t = 1.060660172 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + t = 1.060660172 + -0.5 t = 1.060660172 + -0.5 Combine like terms: 1.060660172 + -0.5 = 0.560660172 t = 0.560660172 Simplifying t = 0.560660172

Subproblem 2

t + 0.5 = -1.060660172 Simplifying t + 0.5 = -1.060660172 Reorder the terms: 0.5 + t = -1.060660172 Solving 0.5 + t = -1.060660172 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + t = -1.060660172 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + t = -1.060660172 + -0.5 t = -1.060660172 + -0.5 Combine like terms: -1.060660172 + -0.5 = -1.560660172 t = -1.560660172 Simplifying t = -1.560660172

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.560660172, -1.560660172}

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