7.5=4+35t-16t^2

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Solution for 7.5=4+35t-16t^2 equation:


Simplifying
7.5 = 4 + 35t + -16t2

Solving
7.5 = 4 + 35t + -16t2

Solving for variable 't'.

Combine like terms: 7.5 + -4 = 3.5
3.5 + -35t + 16t2 = 4 + 35t + -16t2 + -4 + -35t + 16t2

Reorder the terms:
3.5 + -35t + 16t2 = 4 + -4 + 35t + -35t + -16t2 + 16t2

Combine like terms: 4 + -4 = 0
3.5 + -35t + 16t2 = 0 + 35t + -35t + -16t2 + 16t2
3.5 + -35t + 16t2 = 35t + -35t + -16t2 + 16t2

Combine like terms: 35t + -35t = 0
3.5 + -35t + 16t2 = 0 + -16t2 + 16t2
3.5 + -35t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
3.5 + -35t + 16t2 = 0

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

Divide each side by '16'.
0.21875 + -2.1875t + t2 = 0

Move the constant term to the right:

Add '-0.21875' to each side of the equation.
0.21875 + -2.1875t + -0.21875 + t2 = 0 + -0.21875

Reorder the terms:
0.21875 + -0.21875 + -2.1875t + t2 = 0 + -0.21875

Combine like terms: 0.21875 + -0.21875 = 0.00000
0.00000 + -2.1875t + t2 = 0 + -0.21875
-2.1875t + t2 = 0 + -0.21875

Combine like terms: 0 + -0.21875 = -0.21875
-2.1875t + t2 = -0.21875

The t term is -2.1875t.  Take half its coefficient (-1.09375).
Square it (1.196289063) and add it to both sides.

Add '1.196289063' to each side of the equation.
-2.1875t + 1.196289063 + t2 = -0.21875 + 1.196289063

Reorder the terms:
1.196289063 + -2.1875t + t2 = -0.21875 + 1.196289063

Combine like terms: -0.21875 + 1.196289063 = 0.977539063
1.196289063 + -2.1875t + t2 = 0.977539063

Factor a perfect square on the left side:
(t + -1.09375)(t + -1.09375) = 0.977539063

Calculate the square root of the right side: 0.988705751

Break this problem into two subproblems by setting 
(t + -1.09375) equal to 0.988705751 and -0.988705751.

Subproblem 1

t + -1.09375 = 0.988705751 Simplifying t + -1.09375 = 0.988705751 Reorder the terms: -1.09375 + t = 0.988705751 Solving -1.09375 + t = 0.988705751 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.09375' to each side of the equation. -1.09375 + 1.09375 + t = 0.988705751 + 1.09375 Combine like terms: -1.09375 + 1.09375 = 0.00000 0.00000 + t = 0.988705751 + 1.09375 t = 0.988705751 + 1.09375 Combine like terms: 0.988705751 + 1.09375 = 2.082455751 t = 2.082455751 Simplifying t = 2.082455751

Subproblem 2

t + -1.09375 = -0.988705751 Simplifying t + -1.09375 = -0.988705751 Reorder the terms: -1.09375 + t = -0.988705751 Solving -1.09375 + t = -0.988705751 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.09375' to each side of the equation. -1.09375 + 1.09375 + t = -0.988705751 + 1.09375 Combine like terms: -1.09375 + 1.09375 = 0.00000 0.00000 + t = -0.988705751 + 1.09375 t = -0.988705751 + 1.09375 Combine like terms: -0.988705751 + 1.09375 = 0.105044249 t = 0.105044249 Simplifying t = 0.105044249

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.082455751, 0.105044249}

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