-2t^2+t-7=0

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

Simplifying
-2t2 + t + -7 = 0

Reorder the terms:
-7 + t + -2t2 = 0

Solving
-7 + t + -2t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
3.5 + -0.5t + t2 = 0

Move the constant term to the right:

Add '-3.5' to each side of the equation.
3.5 + -0.5t + -3.5 + t2 = 0 + -3.5

Reorder the terms:
3.5 + -3.5 + -0.5t + t2 = 0 + -3.5

Combine like terms: 3.5 + -3.5 = 0.0
0.0 + -0.5t + t2 = 0 + -3.5
-0.5t + t2 = 0 + -3.5

Combine like terms: 0 + -3.5 = -3.5
-0.5t + t2 = -3.5

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.
-0.5t + 0.25 + t2 = -3.5 + 0.25

Reorder the terms:
0.25 + -0.5t + t2 = -3.5 + 0.25

Combine like terms: -3.5 + 0.25 = -3.25
0.25 + -0.5t + t2 = -3.25

Factor a perfect square on the left side:
(t + 0.5)(t + 0.5) = -3.25

Can't calculate square root of the right side.

The solution to this equation could not be determined.