42t-0.6t^2=367.5

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Solution for 42t-0.6t^2=367.5 equation:


Simplifying
42t + -0.6t2 = 367.5

Solving
42t + -0.6t2 = 367.5

Solving for variable 't'.

Reorder the terms:
-367.5 + 42t + -0.6t2 = 367.5 + -367.5

Combine like terms: 367.5 + -367.5 = 0.0
-367.5 + 42t + -0.6t2 = 0.0

Begin completing the square.  Divide all terms by
-0.6 the coefficient of the squared term: 

Divide each side by '-0.6'.
612.5 + -70t + t2 = 0

Move the constant term to the right:

Add '-612.5' to each side of the equation.
612.5 + -70t + -612.5 + t2 = 0 + -612.5

Reorder the terms:
612.5 + -612.5 + -70t + t2 = 0 + -612.5

Combine like terms: 612.5 + -612.5 = 0.0
0.0 + -70t + t2 = 0 + -612.5
-70t + t2 = 0 + -612.5

Combine like terms: 0 + -612.5 = -612.5
-70t + t2 = -612.5

The t term is -70t.  Take half its coefficient (-35).
Square it (1225) and add it to both sides.

Add '1225' to each side of the equation.
-70t + 1225 + t2 = -612.5 + 1225

Reorder the terms:
1225 + -70t + t2 = -612.5 + 1225

Combine like terms: -612.5 + 1225 = 612.5
1225 + -70t + t2 = 612.5

Factor a perfect square on the left side:
(t + -35)(t + -35) = 612.5

Calculate the square root of the right side: 24.748737342

Break this problem into two subproblems by setting 
(t + -35) equal to 24.748737342 and -24.748737342.

Subproblem 1

t + -35 = 24.748737342 Simplifying t + -35 = 24.748737342 Reorder the terms: -35 + t = 24.748737342 Solving -35 + t = 24.748737342 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '35' to each side of the equation. -35 + 35 + t = 24.748737342 + 35 Combine like terms: -35 + 35 = 0 0 + t = 24.748737342 + 35 t = 24.748737342 + 35 Combine like terms: 24.748737342 + 35 = 59.748737342 t = 59.748737342 Simplifying t = 59.748737342

Subproblem 2

t + -35 = -24.748737342 Simplifying t + -35 = -24.748737342 Reorder the terms: -35 + t = -24.748737342 Solving -35 + t = -24.748737342 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '35' to each side of the equation. -35 + 35 + t = -24.748737342 + 35 Combine like terms: -35 + 35 = 0 0 + t = -24.748737342 + 35 t = -24.748737342 + 35 Combine like terms: -24.748737342 + 35 = 10.251262658 t = 10.251262658 Simplifying t = 10.251262658

Solution

The solution to the problem is based on the solutions from the subproblems. t = {59.748737342, 10.251262658}

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