4p^2+20p-15=0

Simple and best practice solution for 4p^2+20p-15=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+20p-15=0 equation:


Simplifying
4p2 + 20p + -15 = 0

Reorder the terms:
-15 + 20p + 4p2 = 0

Solving
-15 + 20p + 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'.
-3.75 + 5p + p2 = 0

Move the constant term to the right:

Add '3.75' to each side of the equation.
-3.75 + 5p + 3.75 + p2 = 0 + 3.75

Reorder the terms:
-3.75 + 3.75 + 5p + p2 = 0 + 3.75

Combine like terms: -3.75 + 3.75 = 0.00
0.00 + 5p + p2 = 0 + 3.75
5p + p2 = 0 + 3.75

Combine like terms: 0 + 3.75 = 3.75
5p + p2 = 3.75

The p term is 5p.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5p + 6.25 + p2 = 3.75 + 6.25

Reorder the terms:
6.25 + 5p + p2 = 3.75 + 6.25

Combine like terms: 3.75 + 6.25 = 10
6.25 + 5p + p2 = 10

Factor a perfect square on the left side:
(p + 2.5)(p + 2.5) = 10

Calculate the square root of the right side: 3.16227766

Break this problem into two subproblems by setting 
(p + 2.5) equal to 3.16227766 and -3.16227766.

Subproblem 1

p + 2.5 = 3.16227766 Simplifying p + 2.5 = 3.16227766 Reorder the terms: 2.5 + p = 3.16227766 Solving 2.5 + p = 3.16227766 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + p = 3.16227766 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + p = 3.16227766 + -2.5 p = 3.16227766 + -2.5 Combine like terms: 3.16227766 + -2.5 = 0.66227766 p = 0.66227766 Simplifying p = 0.66227766

Subproblem 2

p + 2.5 = -3.16227766 Simplifying p + 2.5 = -3.16227766 Reorder the terms: 2.5 + p = -3.16227766 Solving 2.5 + p = -3.16227766 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + p = -3.16227766 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + p = -3.16227766 + -2.5 p = -3.16227766 + -2.5 Combine like terms: -3.16227766 + -2.5 = -5.66227766 p = -5.66227766 Simplifying p = -5.66227766

Solution

The solution to the problem is based on the solutions from the subproblems. p = {0.66227766, -5.66227766}

See similar equations:

| 22+b=60 | | 30+a=61 | | 25+q=75 | | P+44=88 | | x-6+5+5=16 | | 6n+9=-3-21-6n | | N+12=62 | | 9+b=49 | | D+13=39 | | 2x+12x^2+3x+3=12x^2 | | x^3+6x^2+8x=5000 | | 30+c=55 | | D+12=36 | | 2(3x^3-20x+25)=0 | | 2x-9x+x= | | 3x^3+9x^2-24x=0 | | 11+m=21 | | y+j=l | | 5+b=15 | | N+10=31 | | P=12n+250 | | 15x-10-6x-24=0 | | 3x-2-2x-8=0 | | (6y+18)(4y-8)=0 | | 6r+5=(8r+16)-2 | | y=10e-0.5 | | 8x+9=6x-12 | | 10a+5-9a=8-6 | | (15x+10)+(36x-36)=280 | | 7+8=n | | x/23=13/23 | | (x-4)*(2x-3)=0 |

Equations solver categories