P^2+14P-74=0

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Solution for P^2+14P-74=0 equation:


Simplifying
P2 + 14P + -74 = 0

Reorder the terms:
-74 + 14P + P2 = 0

Solving
-74 + 14P + P2 = 0

Solving for variable 'P'.

Begin completing the square.

Move the constant term to the right:

Add '74' to each side of the equation.
-74 + 14P + 74 + P2 = 0 + 74

Reorder the terms:
-74 + 74 + 14P + P2 = 0 + 74

Combine like terms: -74 + 74 = 0
0 + 14P + P2 = 0 + 74
14P + P2 = 0 + 74

Combine like terms: 0 + 74 = 74
14P + P2 = 74

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

Add '49' to each side of the equation.
14P + 49 + P2 = 74 + 49

Reorder the terms:
49 + 14P + P2 = 74 + 49

Combine like terms: 74 + 49 = 123
49 + 14P + P2 = 123

Factor a perfect square on the left side:
(P + 7)(P + 7) = 123

Calculate the square root of the right side: 11.090536506

Break this problem into two subproblems by setting 
(P + 7) equal to 11.090536506 and -11.090536506.

Subproblem 1

P + 7 = 11.090536506 Simplifying P + 7 = 11.090536506 Reorder the terms: 7 + P = 11.090536506 Solving 7 + P = 11.090536506 Solving for variable 'P'. Move all terms containing P to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + P = 11.090536506 + -7 Combine like terms: 7 + -7 = 0 0 + P = 11.090536506 + -7 P = 11.090536506 + -7 Combine like terms: 11.090536506 + -7 = 4.090536506 P = 4.090536506 Simplifying P = 4.090536506

Subproblem 2

P + 7 = -11.090536506 Simplifying P + 7 = -11.090536506 Reorder the terms: 7 + P = -11.090536506 Solving 7 + P = -11.090536506 Solving for variable 'P'. Move all terms containing P to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + P = -11.090536506 + -7 Combine like terms: 7 + -7 = 0 0 + P = -11.090536506 + -7 P = -11.090536506 + -7 Combine like terms: -11.090536506 + -7 = -18.090536506 P = -18.090536506 Simplifying P = -18.090536506

Solution

The solution to the problem is based on the solutions from the subproblems. P = {4.090536506, -18.090536506}

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