2=-t^2+8t

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


Simplifying
2 = -1t2 + 8t

Reorder the terms:
2 = 8t + -1t2

Solving
2 = 8t + -1t2

Solving for variable 't'.

Reorder the terms:
2 + -8t + t2 = 8t + -8t + -1t2 + t2

Combine like terms: 8t + -8t = 0
2 + -8t + t2 = 0 + -1t2 + t2
2 + -8t + t2 = -1t2 + t2

Combine like terms: -1t2 + t2 = 0
2 + -8t + t2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -8t + -2 + t2 = 0 + -2

Reorder the terms:
2 + -2 + -8t + t2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -8t + t2 = 0 + -2
-8t + t2 = 0 + -2

Combine like terms: 0 + -2 = -2
-8t + t2 = -2

The t term is -8t.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8t + 16 + t2 = -2 + 16

Reorder the terms:
16 + -8t + t2 = -2 + 16

Combine like terms: -2 + 16 = 14
16 + -8t + t2 = 14

Factor a perfect square on the left side:
(t + -4)(t + -4) = 14

Calculate the square root of the right side: 3.741657387

Break this problem into two subproblems by setting 
(t + -4) equal to 3.741657387 and -3.741657387.

Subproblem 1

t + -4 = 3.741657387 Simplifying t + -4 = 3.741657387 Reorder the terms: -4 + t = 3.741657387 Solving -4 + t = 3.741657387 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + t = 3.741657387 + 4 Combine like terms: -4 + 4 = 0 0 + t = 3.741657387 + 4 t = 3.741657387 + 4 Combine like terms: 3.741657387 + 4 = 7.741657387 t = 7.741657387 Simplifying t = 7.741657387

Subproblem 2

t + -4 = -3.741657387 Simplifying t + -4 = -3.741657387 Reorder the terms: -4 + t = -3.741657387 Solving -4 + t = -3.741657387 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + t = -3.741657387 + 4 Combine like terms: -4 + 4 = 0 0 + t = -3.741657387 + 4 t = -3.741657387 + 4 Combine like terms: -3.741657387 + 4 = 0.258342613 t = 0.258342613 Simplifying t = 0.258342613

Solution

The solution to the problem is based on the solutions from the subproblems. t = {7.741657387, 0.258342613}

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