-7+13t-5t^2=0

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Solution for -7+13t-5t^2=0 equation:


Simplifying
-7 + 13t + -5t2 = 0

Solving
-7 + 13t + -5t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
1.4 + -2.6t + t2 = 0

Move the constant term to the right:

Add '-1.4' to each side of the equation.
1.4 + -2.6t + -1.4 + t2 = 0 + -1.4

Reorder the terms:
1.4 + -1.4 + -2.6t + t2 = 0 + -1.4

Combine like terms: 1.4 + -1.4 = 0.0
0.0 + -2.6t + t2 = 0 + -1.4
-2.6t + t2 = 0 + -1.4

Combine like terms: 0 + -1.4 = -1.4
-2.6t + t2 = -1.4

The t term is -2.6t.  Take half its coefficient (-1.3).
Square it (1.69) and add it to both sides.

Add '1.69' to each side of the equation.
-2.6t + 1.69 + t2 = -1.4 + 1.69

Reorder the terms:
1.69 + -2.6t + t2 = -1.4 + 1.69

Combine like terms: -1.4 + 1.69 = 0.29
1.69 + -2.6t + t2 = 0.29

Factor a perfect square on the left side:
(t + -1.3)(t + -1.3) = 0.29

Calculate the square root of the right side: 0.538516481

Break this problem into two subproblems by setting 
(t + -1.3) equal to 0.538516481 and -0.538516481.

Subproblem 1

t + -1.3 = 0.538516481 Simplifying t + -1.3 = 0.538516481 Reorder the terms: -1.3 + t = 0.538516481 Solving -1.3 + t = 0.538516481 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.3' to each side of the equation. -1.3 + 1.3 + t = 0.538516481 + 1.3 Combine like terms: -1.3 + 1.3 = 0.0 0.0 + t = 0.538516481 + 1.3 t = 0.538516481 + 1.3 Combine like terms: 0.538516481 + 1.3 = 1.838516481 t = 1.838516481 Simplifying t = 1.838516481

Subproblem 2

t + -1.3 = -0.538516481 Simplifying t + -1.3 = -0.538516481 Reorder the terms: -1.3 + t = -0.538516481 Solving -1.3 + t = -0.538516481 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.3' to each side of the equation. -1.3 + 1.3 + t = -0.538516481 + 1.3 Combine like terms: -1.3 + 1.3 = 0.0 0.0 + t = -0.538516481 + 1.3 t = -0.538516481 + 1.3 Combine like terms: -0.538516481 + 1.3 = 0.761483519 t = 0.761483519 Simplifying t = 0.761483519

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.838516481, 0.761483519}

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