25=23t-5t^2

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Solution for 25=23t-5t^2 equation:


Simplifying
25 = 23t + -5t2

Solving
25 = 23t + -5t2

Solving for variable 't'.

Reorder the terms:
25 + -23t + 5t2 = 23t + -23t + -5t2 + 5t2

Combine like terms: 23t + -23t = 0
25 + -23t + 5t2 = 0 + -5t2 + 5t2
25 + -23t + 5t2 = -5t2 + 5t2

Combine like terms: -5t2 + 5t2 = 0
25 + -23t + 5t2 = 0

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

Divide each side by '5'.
5 + -4.6t + t2 = 0

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + -4.6t + -5 + t2 = 0 + -5

Reorder the terms:
5 + -5 + -4.6t + t2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -4.6t + t2 = 0 + -5
-4.6t + t2 = 0 + -5

Combine like terms: 0 + -5 = -5
-4.6t + t2 = -5

The t term is -4.6t.  Take half its coefficient (-2.3).
Square it (5.29) and add it to both sides.

Add '5.29' to each side of the equation.
-4.6t + 5.29 + t2 = -5 + 5.29

Reorder the terms:
5.29 + -4.6t + t2 = -5 + 5.29

Combine like terms: -5 + 5.29 = 0.29
5.29 + -4.6t + t2 = 0.29

Factor a perfect square on the left side:
(t + -2.3)(t + -2.3) = 0.29

Calculate the square root of the right side: 0.538516481

Break this problem into two subproblems by setting 
(t + -2.3) equal to 0.538516481 and -0.538516481.

Subproblem 1

t + -2.3 = 0.538516481 Simplifying t + -2.3 = 0.538516481 Reorder the terms: -2.3 + t = 0.538516481 Solving -2.3 + t = 0.538516481 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.3' to each side of the equation. -2.3 + 2.3 + t = 0.538516481 + 2.3 Combine like terms: -2.3 + 2.3 = 0.0 0.0 + t = 0.538516481 + 2.3 t = 0.538516481 + 2.3 Combine like terms: 0.538516481 + 2.3 = 2.838516481 t = 2.838516481 Simplifying t = 2.838516481

Subproblem 2

t + -2.3 = -0.538516481 Simplifying t + -2.3 = -0.538516481 Reorder the terms: -2.3 + t = -0.538516481 Solving -2.3 + t = -0.538516481 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.3' to each side of the equation. -2.3 + 2.3 + t = -0.538516481 + 2.3 Combine like terms: -2.3 + 2.3 = 0.0 0.0 + t = -0.538516481 + 2.3 t = -0.538516481 + 2.3 Combine like terms: -0.538516481 + 2.3 = 1.761483519 t = 1.761483519 Simplifying t = 1.761483519

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.838516481, 1.761483519}

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