-16t^2+45t+6.5=7

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Solution for -16t^2+45t+6.5=7 equation:


Simplifying
-16t2 + 45t + 6.5 = 7

Reorder the terms:
6.5 + 45t + -16t2 = 7

Solving
6.5 + 45t + -16t2 = 7

Solving for variable 't'.

Reorder the terms:
6.5 + -7 + 45t + -16t2 = 7 + -7

Combine like terms: 6.5 + -7 = -0.5
-0.5 + 45t + -16t2 = 7 + -7

Combine like terms: 7 + -7 = 0
-0.5 + 45t + -16t2 = 0

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

Divide each side by '-16'.
0.03125 + -2.8125t + t2 = 0

Move the constant term to the right:

Add '-0.03125' to each side of the equation.
0.03125 + -2.8125t + -0.03125 + t2 = 0 + -0.03125

Reorder the terms:
0.03125 + -0.03125 + -2.8125t + t2 = 0 + -0.03125

Combine like terms: 0.03125 + -0.03125 = 0.00000
0.00000 + -2.8125t + t2 = 0 + -0.03125
-2.8125t + t2 = 0 + -0.03125

Combine like terms: 0 + -0.03125 = -0.03125
-2.8125t + t2 = -0.03125

The t term is -2.8125t.  Take half its coefficient (-1.40625).
Square it (1.977539063) and add it to both sides.

Add '1.977539063' to each side of the equation.
-2.8125t + 1.977539063 + t2 = -0.03125 + 1.977539063

Reorder the terms:
1.977539063 + -2.8125t + t2 = -0.03125 + 1.977539063

Combine like terms: -0.03125 + 1.977539063 = 1.946289063
1.977539063 + -2.8125t + t2 = 1.946289063

Factor a perfect square on the left side:
(t + -1.40625)(t + -1.40625) = 1.946289063

Calculate the square root of the right side: 1.395094643

Break this problem into two subproblems by setting 
(t + -1.40625) equal to 1.395094643 and -1.395094643.

Subproblem 1

t + -1.40625 = 1.395094643 Simplifying t + -1.40625 = 1.395094643 Reorder the terms: -1.40625 + t = 1.395094643 Solving -1.40625 + t = 1.395094643 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.40625' to each side of the equation. -1.40625 + 1.40625 + t = 1.395094643 + 1.40625 Combine like terms: -1.40625 + 1.40625 = 0.00000 0.00000 + t = 1.395094643 + 1.40625 t = 1.395094643 + 1.40625 Combine like terms: 1.395094643 + 1.40625 = 2.801344643 t = 2.801344643 Simplifying t = 2.801344643

Subproblem 2

t + -1.40625 = -1.395094643 Simplifying t + -1.40625 = -1.395094643 Reorder the terms: -1.40625 + t = -1.395094643 Solving -1.40625 + t = -1.395094643 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.40625' to each side of the equation. -1.40625 + 1.40625 + t = -1.395094643 + 1.40625 Combine like terms: -1.40625 + 1.40625 = 0.00000 0.00000 + t = -1.395094643 + 1.40625 t = -1.395094643 + 1.40625 Combine like terms: -1.395094643 + 1.40625 = 0.011155357 t = 0.011155357 Simplifying t = 0.011155357

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.801344643, 0.011155357}

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