-4t^2+3t-40=0

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Solution for -4t^2+3t-40=0 equation:


Simplifying
-4t2 + 3t + -40 = 0

Reorder the terms:
-40 + 3t + -4t2 = 0

Solving
-40 + 3t + -4t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
10 + -0.75t + t2 = 0

Move the constant term to the right:

Add '-10' to each side of the equation.
10 + -0.75t + -10 + t2 = 0 + -10

Reorder the terms:
10 + -10 + -0.75t + t2 = 0 + -10

Combine like terms: 10 + -10 = 0
0 + -0.75t + t2 = 0 + -10
-0.75t + t2 = 0 + -10

Combine like terms: 0 + -10 = -10
-0.75t + t2 = -10

The t term is -0.75t.  Take half its coefficient (-0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
-0.75t + 0.140625 + t2 = -10 + 0.140625

Reorder the terms:
0.140625 + -0.75t + t2 = -10 + 0.140625

Combine like terms: -10 + 0.140625 = -9.859375
0.140625 + -0.75t + t2 = -9.859375

Factor a perfect square on the left side:
(t + -0.375)(t + -0.375) = -9.859375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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