t^2+4t=200

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Solution for t^2+4t=200 equation:


Simplifying
t2 + 4t = 200

Reorder the terms:
4t + t2 = 200

Solving
4t + t2 = 200

Solving for variable 't'.

Reorder the terms:
-200 + 4t + t2 = 200 + -200

Combine like terms: 200 + -200 = 0
-200 + 4t + t2 = 0

Begin completing the square.

Move the constant term to the right:

Add '200' to each side of the equation.
-200 + 4t + 200 + t2 = 0 + 200

Reorder the terms:
-200 + 200 + 4t + t2 = 0 + 200

Combine like terms: -200 + 200 = 0
0 + 4t + t2 = 0 + 200
4t + t2 = 0 + 200

Combine like terms: 0 + 200 = 200
4t + t2 = 200

The t term is 4t.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4t + 4 + t2 = 200 + 4

Reorder the terms:
4 + 4t + t2 = 200 + 4

Combine like terms: 200 + 4 = 204
4 + 4t + t2 = 204

Factor a perfect square on the left side:
(t + 2)(t + 2) = 204

Calculate the square root of the right side: 14.282856857

Break this problem into two subproblems by setting 
(t + 2) equal to 14.282856857 and -14.282856857.

Subproblem 1

t + 2 = 14.282856857 Simplifying t + 2 = 14.282856857 Reorder the terms: 2 + t = 14.282856857 Solving 2 + t = 14.282856857 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + t = 14.282856857 + -2 Combine like terms: 2 + -2 = 0 0 + t = 14.282856857 + -2 t = 14.282856857 + -2 Combine like terms: 14.282856857 + -2 = 12.282856857 t = 12.282856857 Simplifying t = 12.282856857

Subproblem 2

t + 2 = -14.282856857 Simplifying t + 2 = -14.282856857 Reorder the terms: 2 + t = -14.282856857 Solving 2 + t = -14.282856857 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + t = -14.282856857 + -2 Combine like terms: 2 + -2 = 0 0 + t = -14.282856857 + -2 t = -14.282856857 + -2 Combine like terms: -14.282856857 + -2 = -16.282856857 t = -16.282856857 Simplifying t = -16.282856857

Solution

The solution to the problem is based on the solutions from the subproblems. t = {12.282856857, -16.282856857}

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