8t^2+35t-16=0

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Solution for 8t^2+35t-16=0 equation:


Simplifying
8t2 + 35t + -16 = 0

Reorder the terms:
-16 + 35t + 8t2 = 0

Solving
-16 + 35t + 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'.
-2 + 4.375t + t2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + 4.375t + 2 + t2 = 0 + 2

Reorder the terms:
-2 + 2 + 4.375t + t2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + 4.375t + t2 = 0 + 2
4.375t + t2 = 0 + 2

Combine like terms: 0 + 2 = 2
4.375t + t2 = 2

The t term is 4.375t.  Take half its coefficient (2.1875).
Square it (4.78515625) and add it to both sides.

Add '4.78515625' to each side of the equation.
4.375t + 4.78515625 + t2 = 2 + 4.78515625

Reorder the terms:
4.78515625 + 4.375t + t2 = 2 + 4.78515625

Combine like terms: 2 + 4.78515625 = 6.78515625
4.78515625 + 4.375t + t2 = 6.78515625

Factor a perfect square on the left side:
(t + 2.1875)(t + 2.1875) = 6.78515625

Calculate the square root of the right side: 2.604833248

Break this problem into two subproblems by setting 
(t + 2.1875) equal to 2.604833248 and -2.604833248.

Subproblem 1

t + 2.1875 = 2.604833248 Simplifying t + 2.1875 = 2.604833248 Reorder the terms: 2.1875 + t = 2.604833248 Solving 2.1875 + t = 2.604833248 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-2.1875' to each side of the equation. 2.1875 + -2.1875 + t = 2.604833248 + -2.1875 Combine like terms: 2.1875 + -2.1875 = 0.0000 0.0000 + t = 2.604833248 + -2.1875 t = 2.604833248 + -2.1875 Combine like terms: 2.604833248 + -2.1875 = 0.417333248 t = 0.417333248 Simplifying t = 0.417333248

Subproblem 2

t + 2.1875 = -2.604833248 Simplifying t + 2.1875 = -2.604833248 Reorder the terms: 2.1875 + t = -2.604833248 Solving 2.1875 + t = -2.604833248 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-2.1875' to each side of the equation. 2.1875 + -2.1875 + t = -2.604833248 + -2.1875 Combine like terms: 2.1875 + -2.1875 = 0.0000 0.0000 + t = -2.604833248 + -2.1875 t = -2.604833248 + -2.1875 Combine like terms: -2.604833248 + -2.1875 = -4.792333248 t = -4.792333248 Simplifying t = -4.792333248

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.417333248, -4.792333248}

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