-0.05*t^2+1.8*t+70=0

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Solution for -0.05*t^2+1.8*t+70=0 equation:


Simplifying
-0.05t2 + 1.8t + 70 = 0

Reorder the terms:
70 + 1.8t + -0.05t2 = 0

Solving
70 + 1.8t + -0.05t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-0.05 the coefficient of the squared term: 

Divide each side by '-0.05'.
-1400 + -36t + t2 = 0

Move the constant term to the right:

Add '1400' to each side of the equation.
-1400 + -36t + 1400 + t2 = 0 + 1400

Reorder the terms:
-1400 + 1400 + -36t + t2 = 0 + 1400

Combine like terms: -1400 + 1400 = 0
0 + -36t + t2 = 0 + 1400
-36t + t2 = 0 + 1400

Combine like terms: 0 + 1400 = 1400
-36t + t2 = 1400

The t term is -36t.  Take half its coefficient (-18).
Square it (324) and add it to both sides.

Add '324' to each side of the equation.
-36t + 324 + t2 = 1400 + 324

Reorder the terms:
324 + -36t + t2 = 1400 + 324

Combine like terms: 1400 + 324 = 1724
324 + -36t + t2 = 1724

Factor a perfect square on the left side:
(t + -18)(t + -18) = 1724

Calculate the square root of the right side: 41.521078984

Break this problem into two subproblems by setting 
(t + -18) equal to 41.521078984 and -41.521078984.

Subproblem 1

t + -18 = 41.521078984 Simplifying t + -18 = 41.521078984 Reorder the terms: -18 + t = 41.521078984 Solving -18 + t = 41.521078984 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + t = 41.521078984 + 18 Combine like terms: -18 + 18 = 0 0 + t = 41.521078984 + 18 t = 41.521078984 + 18 Combine like terms: 41.521078984 + 18 = 59.521078984 t = 59.521078984 Simplifying t = 59.521078984

Subproblem 2

t + -18 = -41.521078984 Simplifying t + -18 = -41.521078984 Reorder the terms: -18 + t = -41.521078984 Solving -18 + t = -41.521078984 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + t = -41.521078984 + 18 Combine like terms: -18 + 18 = 0 0 + t = -41.521078984 + 18 t = -41.521078984 + 18 Combine like terms: -41.521078984 + 18 = -23.521078984 t = -23.521078984 Simplifying t = -23.521078984

Solution

The solution to the problem is based on the solutions from the subproblems. t = {59.521078984, -23.521078984}

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