p^2-4p-16=0

Simple and best practice solution for p^2-4p-16=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for p^2-4p-16=0 equation:


Simplifying
p2 + -4p + -16 = 0

Reorder the terms:
-16 + -4p + p2 = 0

Solving
-16 + -4p + p2 = 0

Solving for variable 'p'.

Begin completing the square.

Move the constant term to the right:

Add '16' to each side of the equation.
-16 + -4p + 16 + p2 = 0 + 16

Reorder the terms:
-16 + 16 + -4p + p2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + -4p + p2 = 0 + 16
-4p + p2 = 0 + 16

Combine like terms: 0 + 16 = 16
-4p + p2 = 16

The p term is -4p.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4p + 4 + p2 = 16 + 4

Reorder the terms:
4 + -4p + p2 = 16 + 4

Combine like terms: 16 + 4 = 20
4 + -4p + p2 = 20

Factor a perfect square on the left side:
(p + -2)(p + -2) = 20

Calculate the square root of the right side: 4.472135955

Break this problem into two subproblems by setting 
(p + -2) equal to 4.472135955 and -4.472135955.

Subproblem 1

p + -2 = 4.472135955 Simplifying p + -2 = 4.472135955 Reorder the terms: -2 + p = 4.472135955 Solving -2 + p = 4.472135955 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + p = 4.472135955 + 2 Combine like terms: -2 + 2 = 0 0 + p = 4.472135955 + 2 p = 4.472135955 + 2 Combine like terms: 4.472135955 + 2 = 6.472135955 p = 6.472135955 Simplifying p = 6.472135955

Subproblem 2

p + -2 = -4.472135955 Simplifying p + -2 = -4.472135955 Reorder the terms: -2 + p = -4.472135955 Solving -2 + p = -4.472135955 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + p = -4.472135955 + 2 Combine like terms: -2 + 2 = 0 0 + p = -4.472135955 + 2 p = -4.472135955 + 2 Combine like terms: -4.472135955 + 2 = -2.472135955 p = -2.472135955 Simplifying p = -2.472135955

Solution

The solution to the problem is based on the solutions from the subproblems. p = {6.472135955, -2.472135955}

See similar equations:

| (x*0.4)+x=20 | | 440*X=2475 | | 3(2x-55)=35 | | y-6=4 | | 6x+2=5x+22 | | P^2-8=2p | | 4x-148=2x+556 | | 5x+2x-15=9 | | 3m+1=1 | | -x+23=3(4x-4)+9 | | 4(x-3)=-44 | | 4-(3x+2)=2(x+6) | | x+27=3(3x+1) | | 7p+5=12 | | 5x+7=3(2x+2) | | 0=4x*x+2t-4 | | 8x+13=45 | | 4(3x+2)+5=-2x+27 | | -3(2n+1)+7=5 | | 4(3x+1)+10=26 | | 6a-10a-3(2a)=50-5(8) | | 4(x+4)=x+37 | | 4(x+5)=5x+23 | | 4xm+5x=10 | | S^2-9x+18=0 | | 2.252*30-29.578*30+5240.216=0 | | 5x+17=9x-8 | | 10x+6(2x+4)=32 | | 360=3x+78+(2x-12) | | 518x=70 | | X=-3x+5 | | 518x=-70 |

Equations solver categories