42=6+29t+5t^2

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Solution for 42=6+29t+5t^2 equation:


Simplifying
42 = 6 + 29t + 5t2

Solving
42 = 6 + 29t + 5t2

Solving for variable 't'.

Combine like terms: 42 + -6 = 36
36 + -29t + -5t2 = 6 + 29t + 5t2 + -6 + -29t + -5t2

Reorder the terms:
36 + -29t + -5t2 = 6 + -6 + 29t + -29t + 5t2 + -5t2

Combine like terms: 6 + -6 = 0
36 + -29t + -5t2 = 0 + 29t + -29t + 5t2 + -5t2
36 + -29t + -5t2 = 29t + -29t + 5t2 + -5t2

Combine like terms: 29t + -29t = 0
36 + -29t + -5t2 = 0 + 5t2 + -5t2
36 + -29t + -5t2 = 5t2 + -5t2

Combine like terms: 5t2 + -5t2 = 0
36 + -29t + -5t2 = 0

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

Divide each side by '-5'.
-7.2 + 5.8t + t2 = 0

Move the constant term to the right:

Add '7.2' to each side of the equation.
-7.2 + 5.8t + 7.2 + t2 = 0 + 7.2

Reorder the terms:
-7.2 + 7.2 + 5.8t + t2 = 0 + 7.2

Combine like terms: -7.2 + 7.2 = 0.0
0.0 + 5.8t + t2 = 0 + 7.2
5.8t + t2 = 0 + 7.2

Combine like terms: 0 + 7.2 = 7.2
5.8t + t2 = 7.2

The t term is 5.8t.  Take half its coefficient (2.9).
Square it (8.41) and add it to both sides.

Add '8.41' to each side of the equation.
5.8t + 8.41 + t2 = 7.2 + 8.41

Reorder the terms:
8.41 + 5.8t + t2 = 7.2 + 8.41

Combine like terms: 7.2 + 8.41 = 15.61
8.41 + 5.8t + t2 = 15.61

Factor a perfect square on the left side:
(t + 2.9)(t + 2.9) = 15.61

Calculate the square root of the right side: 3.950949253

Break this problem into two subproblems by setting 
(t + 2.9) equal to 3.950949253 and -3.950949253.

Subproblem 1

t + 2.9 = 3.950949253 Simplifying t + 2.9 = 3.950949253 Reorder the terms: 2.9 + t = 3.950949253 Solving 2.9 + t = 3.950949253 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-2.9' to each side of the equation. 2.9 + -2.9 + t = 3.950949253 + -2.9 Combine like terms: 2.9 + -2.9 = 0.0 0.0 + t = 3.950949253 + -2.9 t = 3.950949253 + -2.9 Combine like terms: 3.950949253 + -2.9 = 1.050949253 t = 1.050949253 Simplifying t = 1.050949253

Subproblem 2

t + 2.9 = -3.950949253 Simplifying t + 2.9 = -3.950949253 Reorder the terms: 2.9 + t = -3.950949253 Solving 2.9 + t = -3.950949253 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-2.9' to each side of the equation. 2.9 + -2.9 + t = -3.950949253 + -2.9 Combine like terms: 2.9 + -2.9 = 0.0 0.0 + t = -3.950949253 + -2.9 t = -3.950949253 + -2.9 Combine like terms: -3.950949253 + -2.9 = -6.850949253 t = -6.850949253 Simplifying t = -6.850949253

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.050949253, -6.850949253}

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