p^2+20p-71=5

Simple and best practice solution for p^2+20p-71=5 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+20p-71=5 equation:


Simplifying
p2 + 20p + -71 = 5

Reorder the terms:
-71 + 20p + p2 = 5

Solving
-71 + 20p + p2 = 5

Solving for variable 'p'.

Reorder the terms:
-71 + -5 + 20p + p2 = 5 + -5

Combine like terms: -71 + -5 = -76
-76 + 20p + p2 = 5 + -5

Combine like terms: 5 + -5 = 0
-76 + 20p + p2 = 0

Begin completing the square.

Move the constant term to the right:

Add '76' to each side of the equation.
-76 + 20p + 76 + p2 = 0 + 76

Reorder the terms:
-76 + 76 + 20p + p2 = 0 + 76

Combine like terms: -76 + 76 = 0
0 + 20p + p2 = 0 + 76
20p + p2 = 0 + 76

Combine like terms: 0 + 76 = 76
20p + p2 = 76

The p term is 20p.  Take half its coefficient (10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
20p + 100 + p2 = 76 + 100

Reorder the terms:
100 + 20p + p2 = 76 + 100

Combine like terms: 76 + 100 = 176
100 + 20p + p2 = 176

Factor a perfect square on the left side:
(p + 10)(p + 10) = 176

Calculate the square root of the right side: 13.266499161

Break this problem into two subproblems by setting 
(p + 10) equal to 13.266499161 and -13.266499161.

Subproblem 1

p + 10 = 13.266499161 Simplifying p + 10 = 13.266499161 Reorder the terms: 10 + p = 13.266499161 Solving 10 + p = 13.266499161 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + p = 13.266499161 + -10 Combine like terms: 10 + -10 = 0 0 + p = 13.266499161 + -10 p = 13.266499161 + -10 Combine like terms: 13.266499161 + -10 = 3.266499161 p = 3.266499161 Simplifying p = 3.266499161

Subproblem 2

p + 10 = -13.266499161 Simplifying p + 10 = -13.266499161 Reorder the terms: 10 + p = -13.266499161 Solving 10 + p = -13.266499161 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + p = -13.266499161 + -10 Combine like terms: 10 + -10 = 0 0 + p = -13.266499161 + -10 p = -13.266499161 + -10 Combine like terms: -13.266499161 + -10 = -23.266499161 p = -23.266499161 Simplifying p = -23.266499161

Solution

The solution to the problem is based on the solutions from the subproblems. p = {3.266499161, -23.266499161}

See similar equations:

| 5c+2-3c=2 | | 2+3x-x=16 | | -6(n+7)=-2(6+4n) | | x^2-3x-20=90 | | 7x-30=9x+16 | | -6x-5(-x-17)=95 | | 6-8k-7k=6 | | 3n+5=29 | | 5(x+2)=-4 | | 3x-2-7x=-18 | | 7x-42y=6 | | 2z+5+(-3z)= | | 3x+5+31=-6(2x-1) | | 6(3x-5n)-7x=25 | | 15n-30+45+40n= | | (x^2)+18=0 | | 12x-7x=50 | | 72-15=y | | (-a-3)-(3a-a^2-5)= | | 4+5b= | | (6x^2-7x^3)-(2x^2-x^3)= | | 5x-3+6x=129 | | 12-7x=4x+24 | | -7(k+7)=9(k-5)-14k | | 41=5x+6 | | 3x+-2x+8=2x | | 9c+2=2(c-6) | | 27x+19-39x=-63 | | b^2+4b^2= | | x^3+10x^2+6x+1=0 | | (5x+20)+x=180 | | 3x-5+8=21 |

Equations solver categories