-3.5t^2+4.7t-2.9=0

Solution for -3.5t^2+4.7t-2.9=0 equation:

Simplifying
-3.5t2 + 4.7t + -2.9 = 0

Reorder the terms:
-2.9 + 4.7t + -3.5t2 = 0

Solving
-2.9 + 4.7t + -3.5t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-3.5 the coefficient of the squared term: 

Divide each side by '-3.5'.
0.8285714286 + -1.342857143t + t2 = 0

Move the constant term to the right:

Add '-0.8285714286' to each side of the equation.
0.8285714286 + -1.342857143t + -0.8285714286 + t2 = 0 + -0.8285714286

Reorder the terms:
0.8285714286 + -0.8285714286 + -1.342857143t + t2 = 0 + -0.8285714286

Combine like terms: 0.8285714286 + -0.8285714286 = 0.0000000000
0.0000000000 + -1.342857143t + t2 = 0 + -0.8285714286
-1.342857143t + t2 = 0 + -0.8285714286

Combine like terms: 0 + -0.8285714286 = -0.8285714286
-1.342857143t + t2 = -0.8285714286

The t term is -1.342857143t.  Take half its coefficient (-0.6714285715).
Square it (0.4508163266) and add it to both sides.

Add '0.4508163266' to each side of the equation.
-1.342857143t + 0.4508163266 + t2 = -0.8285714286 + 0.4508163266

Reorder the terms:
0.4508163266 + -1.342857143t + t2 = -0.8285714286 + 0.4508163266

Combine like terms: -0.8285714286 + 0.4508163266 = -0.377755102
0.4508163266 + -1.342857143t + t2 = -0.377755102

Factor a perfect square on the left side:
(t + -0.6714285715)(t + -0.6714285715) = -0.377755102

Can't calculate square root of the right side.

The solution to this equation could not be determined.