p^2-8p-5=0

Simple and best practice solution for p^2-8p-5=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^2-8p-5=0 equation:


Simplifying
p2 + -8p + -5 = 0

Reorder the terms:
-5 + -8p + p2 = 0

Solving
-5 + -8p + p2 = 0

Solving for variable 'p'.

Begin completing the square.

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + -8p + 5 + p2 = 0 + 5

Reorder the terms:
-5 + 5 + -8p + p2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -8p + p2 = 0 + 5
-8p + p2 = 0 + 5

Combine like terms: 0 + 5 = 5
-8p + p2 = 5

The p term is -8p.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8p + 16 + p2 = 5 + 16

Reorder the terms:
16 + -8p + p2 = 5 + 16

Combine like terms: 5 + 16 = 21
16 + -8p + p2 = 21

Factor a perfect square on the left side:
(p + -4)(p + -4) = 21

Calculate the square root of the right side: 4.582575695

Break this problem into two subproblems by setting 
(p + -4) equal to 4.582575695 and -4.582575695.

Subproblem 1

p + -4 = 4.582575695 Simplifying p + -4 = 4.582575695 Reorder the terms: -4 + p = 4.582575695 Solving -4 + p = 4.582575695 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + p = 4.582575695 + 4 Combine like terms: -4 + 4 = 0 0 + p = 4.582575695 + 4 p = 4.582575695 + 4 Combine like terms: 4.582575695 + 4 = 8.582575695 p = 8.582575695 Simplifying p = 8.582575695

Subproblem 2

p + -4 = -4.582575695 Simplifying p + -4 = -4.582575695 Reorder the terms: -4 + p = -4.582575695 Solving -4 + p = -4.582575695 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + p = -4.582575695 + 4 Combine like terms: -4 + 4 = 0 0 + p = -4.582575695 + 4 p = -4.582575695 + 4 Combine like terms: -4.582575695 + 4 = -0.582575695 p = -0.582575695 Simplifying p = -0.582575695

Solution

The solution to the problem is based on the solutions from the subproblems. p = {8.582575695, -0.582575695}

See similar equations:

| 8z-24=z+12 | | 8z-24=x+12 | | z+12=8z-24 | | 2.4w-1.65=1.23 | | -32+58=98g-73 | | 2(2x+8)=56 | | 38b=4(4b-1)+12 | | A^2-5a=2a+18 | | 5(x-7)=8x-1 | | (9s-5g)/11=c | | 2x+8=3z-11 | | -23+8x+4-x=11+9x | | (1-4*x^2)/(1-2*x)=9/7.84 | | 15x+19= | | 2-7i/-i÷i/i=2i/1= | | (1-4*kc^2)/(1-2*kc)=1.147959 | | (3y+8)+(2y-3)+90=180 | | 22x-30= | | 3r+2.7=8.4 | | 8m-2q=59 | | 3y+8=2y-3 | | 3x+14=66-7x | | .0001/10000= | | 6y+2=8y-22 | | 9-5x-9x+4= | | 3y+2=8y-22 | | 1/3(2x-6)=3 | | (-14x^2)(14xy)(24xy)(-8x^2)(6)= | | 6y+14=8y-20 | | lnx-lnx^2=6 | | 7000x+3500y+1000(1-x-y)=2500x+3500y+4000(1-x-y) | | 1/7-1/14 |

Equations solver categories