t^2=40-14t

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Solution for t^2=40-14t equation:


Simplifying
t2 = 40 + -14t

Solving
t2 = 40 + -14t

Solving for variable 't'.

Reorder the terms:
-40 + 14t + t2 = 40 + -14t + -40 + 14t

Reorder the terms:
-40 + 14t + t2 = 40 + -40 + -14t + 14t

Combine like terms: 40 + -40 = 0
-40 + 14t + t2 = 0 + -14t + 14t
-40 + 14t + t2 = -14t + 14t

Combine like terms: -14t + 14t = 0
-40 + 14t + t2 = 0

Begin completing the square.

Move the constant term to the right:

Add '40' to each side of the equation.
-40 + 14t + 40 + t2 = 0 + 40

Reorder the terms:
-40 + 40 + 14t + t2 = 0 + 40

Combine like terms: -40 + 40 = 0
0 + 14t + t2 = 0 + 40
14t + t2 = 0 + 40

Combine like terms: 0 + 40 = 40
14t + t2 = 40

The t term is 14t.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14t + 49 + t2 = 40 + 49

Reorder the terms:
49 + 14t + t2 = 40 + 49

Combine like terms: 40 + 49 = 89
49 + 14t + t2 = 89

Factor a perfect square on the left side:
(t + 7)(t + 7) = 89

Calculate the square root of the right side: 9.433981132

Break this problem into two subproblems by setting 
(t + 7) equal to 9.433981132 and -9.433981132.

Subproblem 1

t + 7 = 9.433981132 Simplifying t + 7 = 9.433981132 Reorder the terms: 7 + t = 9.433981132 Solving 7 + t = 9.433981132 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + t = 9.433981132 + -7 Combine like terms: 7 + -7 = 0 0 + t = 9.433981132 + -7 t = 9.433981132 + -7 Combine like terms: 9.433981132 + -7 = 2.433981132 t = 2.433981132 Simplifying t = 2.433981132

Subproblem 2

t + 7 = -9.433981132 Simplifying t + 7 = -9.433981132 Reorder the terms: 7 + t = -9.433981132 Solving 7 + t = -9.433981132 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + t = -9.433981132 + -7 Combine like terms: 7 + -7 = 0 0 + t = -9.433981132 + -7 t = -9.433981132 + -7 Combine like terms: -9.433981132 + -7 = -16.433981132 t = -16.433981132 Simplifying t = -16.433981132

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.433981132, -16.433981132}

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