4t^2-40t+25=0

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Solution for 4t^2-40t+25=0 equation:


Simplifying
4t2 + -40t + 25 = 0

Reorder the terms:
25 + -40t + 4t2 = 0

Solving
25 + -40t + 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'.
6.25 + -10t + t2 = 0

Move the constant term to the right:

Add '-6.25' to each side of the equation.
6.25 + -10t + -6.25 + t2 = 0 + -6.25

Reorder the terms:
6.25 + -6.25 + -10t + t2 = 0 + -6.25

Combine like terms: 6.25 + -6.25 = 0.00
0.00 + -10t + t2 = 0 + -6.25
-10t + t2 = 0 + -6.25

Combine like terms: 0 + -6.25 = -6.25
-10t + t2 = -6.25

The t term is -10t.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10t + 25 + t2 = -6.25 + 25

Reorder the terms:
25 + -10t + t2 = -6.25 + 25

Combine like terms: -6.25 + 25 = 18.75
25 + -10t + t2 = 18.75

Factor a perfect square on the left side:
(t + -5)(t + -5) = 18.75

Calculate the square root of the right side: 4.330127019

Break this problem into two subproblems by setting 
(t + -5) equal to 4.330127019 and -4.330127019.

Subproblem 1

t + -5 = 4.330127019 Simplifying t + -5 = 4.330127019 Reorder the terms: -5 + t = 4.330127019 Solving -5 + t = 4.330127019 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + t = 4.330127019 + 5 Combine like terms: -5 + 5 = 0 0 + t = 4.330127019 + 5 t = 4.330127019 + 5 Combine like terms: 4.330127019 + 5 = 9.330127019 t = 9.330127019 Simplifying t = 9.330127019

Subproblem 2

t + -5 = -4.330127019 Simplifying t + -5 = -4.330127019 Reorder the terms: -5 + t = -4.330127019 Solving -5 + t = -4.330127019 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + t = -4.330127019 + 5 Combine like terms: -5 + 5 = 0 0 + t = -4.330127019 + 5 t = -4.330127019 + 5 Combine like terms: -4.330127019 + 5 = 0.669872981 t = 0.669872981 Simplifying t = 0.669872981

Solution

The solution to the problem is based on the solutions from the subproblems. t = {9.330127019, 0.669872981}

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