3p^2-9p-1=0

Simple and best practice solution for 3p^2-9p-1=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 3p^2-9p-1=0 equation:


Simplifying
3p2 + -9p + -1 = 0

Reorder the terms:
-1 + -9p + 3p2 = 0

Solving
-1 + -9p + 3p2 = 0

Solving for variable 'p'.

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

Divide each side by '3'.
-0.3333333333 + -3p + p2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + -3p + 0.3333333333 + p2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + -3p + p2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + -3p + p2 = 0 + 0.3333333333
-3p + p2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
-3p + p2 = 0.3333333333

The p term is -3p.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3p + 2.25 + p2 = 0.3333333333 + 2.25

Reorder the terms:
2.25 + -3p + p2 = 0.3333333333 + 2.25

Combine like terms: 0.3333333333 + 2.25 = 2.5833333333
2.25 + -3p + p2 = 2.5833333333

Factor a perfect square on the left side:
(p + -1.5)(p + -1.5) = 2.5833333333

Calculate the square root of the right side: 1.607275127

Break this problem into two subproblems by setting 
(p + -1.5) equal to 1.607275127 and -1.607275127.

Subproblem 1

p + -1.5 = 1.607275127 Simplifying p + -1.5 = 1.607275127 Reorder the terms: -1.5 + p = 1.607275127 Solving -1.5 + p = 1.607275127 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + p = 1.607275127 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + p = 1.607275127 + 1.5 p = 1.607275127 + 1.5 Combine like terms: 1.607275127 + 1.5 = 3.107275127 p = 3.107275127 Simplifying p = 3.107275127

Subproblem 2

p + -1.5 = -1.607275127 Simplifying p + -1.5 = -1.607275127 Reorder the terms: -1.5 + p = -1.607275127 Solving -1.5 + p = -1.607275127 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + p = -1.607275127 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + p = -1.607275127 + 1.5 p = -1.607275127 + 1.5 Combine like terms: -1.607275127 + 1.5 = -0.107275127 p = -0.107275127 Simplifying p = -0.107275127

Solution

The solution to the problem is based on the solutions from the subproblems. p = {3.107275127, -0.107275127}

See similar equations:

| 2b-67=-8n+5 | | -6n=27 | | (c+3)-(1-3c)=2 | | -5x-3=y | | 256-9x=0. | | -9(w+8)=-3w-36 | | (2x+7)(x^2+7x+8)= | | 4(3a-3)+4=35 | | -9+4n=27 | | 4x^3-3*3x^2=0 | | ?x=12 | | 3(4a-3)+4=35 | | (x)(x+5)=36 | | ?x=16 | | -4x-2y=-13 | | 15b+30=15 | | 5x-14-3=4x+3 | | 1+13x=6x+8 | | (2x)+x+(2x-5)=50 | | 16(-2)-3(-6)+5= | | 13=s/5 | | y-4=2x-2 | | 4x+y=47 | | 3(x-3)(x-3)+2=8 | | 8w^2+2w-21=0 | | 4x^3-9x^2(3)=0 | | -4.2= | | y-3=3x-6 | | m^2+3m-20= | | 4(3c-2)+5c=43 | | 15-28i=3x+(4y)i | | z*4+11=-3 |

Equations solver categories