35t-5t^2=12

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Solution for 35t-5t^2=12 equation:


Simplifying
35t + -5t2 = 12

Solving
35t + -5t2 = 12

Solving for variable 't'.

Reorder the terms:
-12 + 35t + -5t2 = 12 + -12

Combine like terms: 12 + -12 = 0
-12 + 35t + -5t2 = 0

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

Divide each side by '-5'.
2.4 + -7t + t2 = 0

Move the constant term to the right:

Add '-2.4' to each side of the equation.
2.4 + -7t + -2.4 + t2 = 0 + -2.4

Reorder the terms:
2.4 + -2.4 + -7t + t2 = 0 + -2.4

Combine like terms: 2.4 + -2.4 = 0.0
0.0 + -7t + t2 = 0 + -2.4
-7t + t2 = 0 + -2.4

Combine like terms: 0 + -2.4 = -2.4
-7t + t2 = -2.4

The t term is -7t.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7t + 12.25 + t2 = -2.4 + 12.25

Reorder the terms:
12.25 + -7t + t2 = -2.4 + 12.25

Combine like terms: -2.4 + 12.25 = 9.85
12.25 + -7t + t2 = 9.85

Factor a perfect square on the left side:
(t + -3.5)(t + -3.5) = 9.85

Calculate the square root of the right side: 3.138470965

Break this problem into two subproblems by setting 
(t + -3.5) equal to 3.138470965 and -3.138470965.

Subproblem 1

t + -3.5 = 3.138470965 Simplifying t + -3.5 = 3.138470965 Reorder the terms: -3.5 + t = 3.138470965 Solving -3.5 + t = 3.138470965 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + t = 3.138470965 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + t = 3.138470965 + 3.5 t = 3.138470965 + 3.5 Combine like terms: 3.138470965 + 3.5 = 6.638470965 t = 6.638470965 Simplifying t = 6.638470965

Subproblem 2

t + -3.5 = -3.138470965 Simplifying t + -3.5 = -3.138470965 Reorder the terms: -3.5 + t = -3.138470965 Solving -3.5 + t = -3.138470965 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + t = -3.138470965 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + t = -3.138470965 + 3.5 t = -3.138470965 + 3.5 Combine like terms: -3.138470965 + 3.5 = 0.361529035 t = 0.361529035 Simplifying t = 0.361529035

Solution

The solution to the problem is based on the solutions from the subproblems. t = {6.638470965, 0.361529035}

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