4p^2+21p-64=0

Simple and best practice solution for 4p^2+21p-64=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 4p^2+21p-64=0 equation:


Simplifying
4p2 + 21p + -64 = 0

Reorder the terms:
-64 + 21p + 4p2 = 0

Solving
-64 + 21p + 4p2 = 0

Solving for variable 'p'.

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

Divide each side by '4'.
-16 + 5.25p + p2 = 0

Move the constant term to the right:

Add '16' to each side of the equation.
-16 + 5.25p + 16 + p2 = 0 + 16

Reorder the terms:
-16 + 16 + 5.25p + p2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + 5.25p + p2 = 0 + 16
5.25p + p2 = 0 + 16

Combine like terms: 0 + 16 = 16
5.25p + p2 = 16

The p term is 5.25p.  Take half its coefficient (2.625).
Square it (6.890625) and add it to both sides.

Add '6.890625' to each side of the equation.
5.25p + 6.890625 + p2 = 16 + 6.890625

Reorder the terms:
6.890625 + 5.25p + p2 = 16 + 6.890625

Combine like terms: 16 + 6.890625 = 22.890625
6.890625 + 5.25p + p2 = 22.890625

Factor a perfect square on the left side:
(p + 2.625)(p + 2.625) = 22.890625

Calculate the square root of the right side: 4.784414802

Break this problem into two subproblems by setting 
(p + 2.625) equal to 4.784414802 and -4.784414802.

Subproblem 1

p + 2.625 = 4.784414802 Simplifying p + 2.625 = 4.784414802 Reorder the terms: 2.625 + p = 4.784414802 Solving 2.625 + p = 4.784414802 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-2.625' to each side of the equation. 2.625 + -2.625 + p = 4.784414802 + -2.625 Combine like terms: 2.625 + -2.625 = 0.000 0.000 + p = 4.784414802 + -2.625 p = 4.784414802 + -2.625 Combine like terms: 4.784414802 + -2.625 = 2.159414802 p = 2.159414802 Simplifying p = 2.159414802

Subproblem 2

p + 2.625 = -4.784414802 Simplifying p + 2.625 = -4.784414802 Reorder the terms: 2.625 + p = -4.784414802 Solving 2.625 + p = -4.784414802 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-2.625' to each side of the equation. 2.625 + -2.625 + p = -4.784414802 + -2.625 Combine like terms: 2.625 + -2.625 = 0.000 0.000 + p = -4.784414802 + -2.625 p = -4.784414802 + -2.625 Combine like terms: -4.784414802 + -2.625 = -7.409414802 p = -7.409414802 Simplifying p = -7.409414802

Solution

The solution to the problem is based on the solutions from the subproblems. p = {2.159414802, -7.409414802}

See similar equations:

| X^2+6x+y^2-y=23 | | (x^2-16)lnx=0 | | 3(9-z)-35=17z-4(2+5z) | | -3x+4=28whatisx | | 4x+2y=42 | | 3.5x+36.7=16.5-6.6x | | 40-8x=-5-5(4x+3) | | 4+16x=4(4x+3) | | 4(f-4)=-44 | | 7w-6w=91-83 | | 5p^2+4p=0 | | -3+y=9 | | k^3+3k^2+2=0 | | 12-4x=13+6x | | abx+bc+3=0 | | x^3+3k^2+2=0 | | 3x+x+y=90 | | -2xy-4x^2+6x=0 | | x+b=e | | -2xy-4x+6x=0 | | 5.3E-2= | | 6a+8whena=2 | | Y-x=2x | | F(x)=2+xsquared | | 3+78x=52x+11 | | (2q-1)(5q+2)=0 | | 114y=25 | | 15(t+2)+9t=8 | | X^5-3x=e | | 9x-6+6x=8x+6 | | x^6+13x^2+22=0 | | (3+2y)(5-y-5y^2)=0 |

Equations solver categories