-9.8t^2+45t+1=0

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Solution for -9.8t^2+45t+1=0 equation:


Simplifying
-9.8t2 + 45t + 1 = 0

Reorder the terms:
1 + 45t + -9.8t2 = 0

Solving
1 + 45t + -9.8t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-9.8 the coefficient of the squared term: 

Divide each side by '-9.8'.
-0.1020408163 + -4.591836735t + t2 = 0

Move the constant term to the right:

Add '0.1020408163' to each side of the equation.
-0.1020408163 + -4.591836735t + 0.1020408163 + t2 = 0 + 0.1020408163

Reorder the terms:
-0.1020408163 + 0.1020408163 + -4.591836735t + t2 = 0 + 0.1020408163

Combine like terms: -0.1020408163 + 0.1020408163 = 0.0000000000
0.0000000000 + -4.591836735t + t2 = 0 + 0.1020408163
-4.591836735t + t2 = 0 + 0.1020408163

Combine like terms: 0 + 0.1020408163 = 0.1020408163
-4.591836735t + t2 = 0.1020408163

The t term is -4.591836735t.  Take half its coefficient (-2.295918368).
Square it (5.271241153) and add it to both sides.

Add '5.271241153' to each side of the equation.
-4.591836735t + 5.271241153 + t2 = 0.1020408163 + 5.271241153

Reorder the terms:
5.271241153 + -4.591836735t + t2 = 0.1020408163 + 5.271241153

Combine like terms: 0.1020408163 + 5.271241153 = 5.3732819693
5.271241153 + -4.591836735t + t2 = 5.3732819693

Factor a perfect square on the left side:
(t + -2.295918368)(t + -2.295918368) = 5.3732819693

Calculate the square root of the right side: 2.318034074

Break this problem into two subproblems by setting 
(t + -2.295918368) equal to 2.318034074 and -2.318034074.

Subproblem 1

t + -2.295918368 = 2.318034074 Simplifying t + -2.295918368 = 2.318034074 Reorder the terms: -2.295918368 + t = 2.318034074 Solving -2.295918368 + t = 2.318034074 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.295918368' to each side of the equation. -2.295918368 + 2.295918368 + t = 2.318034074 + 2.295918368 Combine like terms: -2.295918368 + 2.295918368 = 0.000000000 0.000000000 + t = 2.318034074 + 2.295918368 t = 2.318034074 + 2.295918368 Combine like terms: 2.318034074 + 2.295918368 = 4.613952442 t = 4.613952442 Simplifying t = 4.613952442

Subproblem 2

t + -2.295918368 = -2.318034074 Simplifying t + -2.295918368 = -2.318034074 Reorder the terms: -2.295918368 + t = -2.318034074 Solving -2.295918368 + t = -2.318034074 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.295918368' to each side of the equation. -2.295918368 + 2.295918368 + t = -2.318034074 + 2.295918368 Combine like terms: -2.295918368 + 2.295918368 = 0.000000000 0.000000000 + t = -2.318034074 + 2.295918368 t = -2.318034074 + 2.295918368 Combine like terms: -2.318034074 + 2.295918368 = -0.022115706 t = -0.022115706 Simplifying t = -0.022115706

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.613952442, -0.022115706}

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