-15t^2+7t+10-100=0

Solution for -15t^2+7t+10-100=0 equation:

Simplifying
-15t2 + 7t + 10 + -100 = 0

Reorder the terms:
10 + -100 + 7t + -15t2 = 0

Combine like terms: 10 + -100 = -90
-90 + 7t + -15t2 = 0

Solving
-90 + 7t + -15t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-15 the coefficient of the squared term: 

Divide each side by '-15'.
6 + -0.4666666667t + t2 = 0

Move the constant term to the right:

Add '-6' to each side of the equation.
6 + -0.4666666667t + -6 + t2 = 0 + -6

Reorder the terms:
6 + -6 + -0.4666666667t + t2 = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -0.4666666667t + t2 = 0 + -6
-0.4666666667t + t2 = 0 + -6

Combine like terms: 0 + -6 = -6
-0.4666666667t + t2 = -6

The t term is -0.4666666667t.  Take half its coefficient (-0.2333333334).
Square it (0.05444444448) and add it to both sides.

Add '0.05444444448' to each side of the equation.
-0.4666666667t + 0.05444444448 + t2 = -6 + 0.05444444448

Reorder the terms:
0.05444444448 + -0.4666666667t + t2 = -6 + 0.05444444448

Combine like terms: -6 + 0.05444444448 = -5.94555555552
0.05444444448 + -0.4666666667t + t2 = -5.94555555552

Factor a perfect square on the left side:
(t + -0.2333333334)(t + -0.2333333334) = -5.94555555552

Can't calculate square root of the right side.

The solution to this equation could not be determined.