20=7+37t-16t^2

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Solution for 20=7+37t-16t^2 equation:


Simplifying
20 = 7 + 37t + -16t2

Solving
20 = 7 + 37t + -16t2

Solving for variable 't'.

Combine like terms: 20 + -7 = 13
13 + -37t + 16t2 = 7 + 37t + -16t2 + -7 + -37t + 16t2

Reorder the terms:
13 + -37t + 16t2 = 7 + -7 + 37t + -37t + -16t2 + 16t2

Combine like terms: 7 + -7 = 0
13 + -37t + 16t2 = 0 + 37t + -37t + -16t2 + 16t2
13 + -37t + 16t2 = 37t + -37t + -16t2 + 16t2

Combine like terms: 37t + -37t = 0
13 + -37t + 16t2 = 0 + -16t2 + 16t2
13 + -37t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
13 + -37t + 16t2 = 0

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

Divide each side by '16'.
0.8125 + -2.3125t + t2 = 0

Move the constant term to the right:

Add '-0.8125' to each side of the equation.
0.8125 + -2.3125t + -0.8125 + t2 = 0 + -0.8125

Reorder the terms:
0.8125 + -0.8125 + -2.3125t + t2 = 0 + -0.8125

Combine like terms: 0.8125 + -0.8125 = 0.0000
0.0000 + -2.3125t + t2 = 0 + -0.8125
-2.3125t + t2 = 0 + -0.8125

Combine like terms: 0 + -0.8125 = -0.8125
-2.3125t + t2 = -0.8125

The t term is -2.3125t.  Take half its coefficient (-1.15625).
Square it (1.336914063) and add it to both sides.

Add '1.336914063' to each side of the equation.
-2.3125t + 1.336914063 + t2 = -0.8125 + 1.336914063

Reorder the terms:
1.336914063 + -2.3125t + t2 = -0.8125 + 1.336914063

Combine like terms: -0.8125 + 1.336914063 = 0.524414063
1.336914063 + -2.3125t + t2 = 0.524414063

Factor a perfect square on the left side:
(t + -1.15625)(t + -1.15625) = 0.524414063

Calculate the square root of the right side: 0.724164389

Break this problem into two subproblems by setting 
(t + -1.15625) equal to 0.724164389 and -0.724164389.

Subproblem 1

t + -1.15625 = 0.724164389 Simplifying t + -1.15625 = 0.724164389 Reorder the terms: -1.15625 + t = 0.724164389 Solving -1.15625 + t = 0.724164389 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.15625' to each side of the equation. -1.15625 + 1.15625 + t = 0.724164389 + 1.15625 Combine like terms: -1.15625 + 1.15625 = 0.00000 0.00000 + t = 0.724164389 + 1.15625 t = 0.724164389 + 1.15625 Combine like terms: 0.724164389 + 1.15625 = 1.880414389 t = 1.880414389 Simplifying t = 1.880414389

Subproblem 2

t + -1.15625 = -0.724164389 Simplifying t + -1.15625 = -0.724164389 Reorder the terms: -1.15625 + t = -0.724164389 Solving -1.15625 + t = -0.724164389 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.15625' to each side of the equation. -1.15625 + 1.15625 + t = -0.724164389 + 1.15625 Combine like terms: -1.15625 + 1.15625 = 0.00000 0.00000 + t = -0.724164389 + 1.15625 t = -0.724164389 + 1.15625 Combine like terms: -0.724164389 + 1.15625 = 0.432085611 t = 0.432085611 Simplifying t = 0.432085611

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.880414389, 0.432085611}

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