t^2+10t=-4

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Solution for t^2+10t=-4 equation:


Simplifying
t2 + 10t = -4

Reorder the terms:
10t + t2 = -4

Solving
10t + t2 = -4

Solving for variable 't'.

Reorder the terms:
4 + 10t + t2 = -4 + 4

Combine like terms: -4 + 4 = 0
4 + 10t + t2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + 10t + -4 + t2 = 0 + -4

Reorder the terms:
4 + -4 + 10t + t2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 10t + t2 = 0 + -4
10t + t2 = 0 + -4

Combine like terms: 0 + -4 = -4
10t + t2 = -4

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 = -4 + 25

Reorder the terms:
25 + 10t + t2 = -4 + 25

Combine like terms: -4 + 25 = 21
25 + 10t + t2 = 21

Factor a perfect square on the left side:
(t + 5)(t + 5) = 21

Calculate the square root of the right side: 4.582575695

Break this problem into two subproblems by setting 
(t + 5) equal to 4.582575695 and -4.582575695.

Subproblem 1

t + 5 = 4.582575695 Simplifying t + 5 = 4.582575695 Reorder the terms: 5 + t = 4.582575695 Solving 5 + t = 4.582575695 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 = 4.582575695 + -5 Combine like terms: 5 + -5 = 0 0 + t = 4.582575695 + -5 t = 4.582575695 + -5 Combine like terms: 4.582575695 + -5 = -0.417424305 t = -0.417424305 Simplifying t = -0.417424305

Subproblem 2

t + 5 = -4.582575695 Simplifying t + 5 = -4.582575695 Reorder the terms: 5 + t = -4.582575695 Solving 5 + t = -4.582575695 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 = -4.582575695 + -5 Combine like terms: 5 + -5 = 0 0 + t = -4.582575695 + -5 t = -4.582575695 + -5 Combine like terms: -4.582575695 + -5 = -9.582575695 t = -9.582575695 Simplifying t = -9.582575695

Solution

The solution to the problem is based on the solutions from the subproblems. t = {-0.417424305, -9.582575695}

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