-3t(2t-5)+4t=5t-9

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Solution for -3t(2t-5)+4t=5t-9 equation:


Simplifying
-3t(2t + -5) + 4t = 5t + -9

Reorder the terms:
-3t(-5 + 2t) + 4t = 5t + -9
(-5 * -3t + 2t * -3t) + 4t = 5t + -9
(15t + -6t2) + 4t = 5t + -9

Reorder the terms:
15t + 4t + -6t2 = 5t + -9

Combine like terms: 15t + 4t = 19t
19t + -6t2 = 5t + -9

Reorder the terms:
19t + -6t2 = -9 + 5t

Solving
19t + -6t2 = -9 + 5t

Solving for variable 't'.

Reorder the terms:
9 + 19t + -5t + -6t2 = -9 + 5t + 9 + -5t

Combine like terms: 19t + -5t = 14t
9 + 14t + -6t2 = -9 + 5t + 9 + -5t

Reorder the terms:
9 + 14t + -6t2 = -9 + 9 + 5t + -5t

Combine like terms: -9 + 9 = 0
9 + 14t + -6t2 = 0 + 5t + -5t
9 + 14t + -6t2 = 5t + -5t

Combine like terms: 5t + -5t = 0
9 + 14t + -6t2 = 0

Begin completing the square.  Divide all terms by
-6 the coefficient of the squared term: 

Divide each side by '-6'.
-1.5 + -2.333333333t + t2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + -2.333333333t + 1.5 + t2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + -2.333333333t + t2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + -2.333333333t + t2 = 0 + 1.5
-2.333333333t + t2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
-2.333333333t + t2 = 1.5

The t term is -2.333333333t.  Take half its coefficient (-1.166666667).
Square it (1.361111112) and add it to both sides.

Add '1.361111112' to each side of the equation.
-2.333333333t + 1.361111112 + t2 = 1.5 + 1.361111112

Reorder the terms:
1.361111112 + -2.333333333t + t2 = 1.5 + 1.361111112

Combine like terms: 1.5 + 1.361111112 = 2.861111112
1.361111112 + -2.333333333t + t2 = 2.861111112

Factor a perfect square on the left side:
(t + -1.166666667)(t + -1.166666667) = 2.861111112

Calculate the square root of the right side: 1.691481928

Break this problem into two subproblems by setting 
(t + -1.166666667) equal to 1.691481928 and -1.691481928.

Subproblem 1

t + -1.166666667 = 1.691481928 Simplifying t + -1.166666667 = 1.691481928 Reorder the terms: -1.166666667 + t = 1.691481928 Solving -1.166666667 + t = 1.691481928 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.166666667' to each side of the equation. -1.166666667 + 1.166666667 + t = 1.691481928 + 1.166666667 Combine like terms: -1.166666667 + 1.166666667 = 0.000000000 0.000000000 + t = 1.691481928 + 1.166666667 t = 1.691481928 + 1.166666667 Combine like terms: 1.691481928 + 1.166666667 = 2.858148595 t = 2.858148595 Simplifying t = 2.858148595

Subproblem 2

t + -1.166666667 = -1.691481928 Simplifying t + -1.166666667 = -1.691481928 Reorder the terms: -1.166666667 + t = -1.691481928 Solving -1.166666667 + t = -1.691481928 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.166666667' to each side of the equation. -1.166666667 + 1.166666667 + t = -1.691481928 + 1.166666667 Combine like terms: -1.166666667 + 1.166666667 = 0.000000000 0.000000000 + t = -1.691481928 + 1.166666667 t = -1.691481928 + 1.166666667 Combine like terms: -1.691481928 + 1.166666667 = -0.524815261 t = -0.524815261 Simplifying t = -0.524815261

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.858148595, -0.524815261}

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