p^2+2p-7=0

Simple and best practice solution for p^2+2p-7=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+2p-7=0 equation:


Simplifying
p2 + 2p + -7 = 0

Reorder the terms:
-7 + 2p + p2 = 0

Solving
-7 + 2p + p2 = 0

Solving for variable 'p'.

Begin completing the square.

Move the constant term to the right:

Add '7' to each side of the equation.
-7 + 2p + 7 + p2 = 0 + 7

Reorder the terms:
-7 + 7 + 2p + p2 = 0 + 7

Combine like terms: -7 + 7 = 0
0 + 2p + p2 = 0 + 7
2p + p2 = 0 + 7

Combine like terms: 0 + 7 = 7
2p + p2 = 7

The p term is 2p.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2p + 1 + p2 = 7 + 1

Reorder the terms:
1 + 2p + p2 = 7 + 1

Combine like terms: 7 + 1 = 8
1 + 2p + p2 = 8

Factor a perfect square on the left side:
(p + 1)(p + 1) = 8

Calculate the square root of the right side: 2.828427125

Break this problem into two subproblems by setting 
(p + 1) equal to 2.828427125 and -2.828427125.

Subproblem 1

p + 1 = 2.828427125 Simplifying p + 1 = 2.828427125 Reorder the terms: 1 + p = 2.828427125 Solving 1 + p = 2.828427125 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + p = 2.828427125 + -1 Combine like terms: 1 + -1 = 0 0 + p = 2.828427125 + -1 p = 2.828427125 + -1 Combine like terms: 2.828427125 + -1 = 1.828427125 p = 1.828427125 Simplifying p = 1.828427125

Subproblem 2

p + 1 = -2.828427125 Simplifying p + 1 = -2.828427125 Reorder the terms: 1 + p = -2.828427125 Solving 1 + p = -2.828427125 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + p = -2.828427125 + -1 Combine like terms: 1 + -1 = 0 0 + p = -2.828427125 + -1 p = -2.828427125 + -1 Combine like terms: -2.828427125 + -1 = -3.828427125 p = -3.828427125 Simplifying p = -3.828427125

Solution

The solution to the problem is based on the solutions from the subproblems. p = {1.828427125, -3.828427125}

See similar equations:

| -6p=-7 | | 20y-40x=60 | | -n-3n=4 | | -11-2b=3(8b-1)-8 | | 3(5x+8)=-43+52 | | 2t^2-4t=34 | | 25=-5*7 | | 17x^2+x= | | 2-3(6p-4)-13p=200 | | 1-3(x+2)=-11x-37 | | -9+8k=7 | | 4(x+12)+8x=12x-48 | | 123=31+2X | | 5(2x+4)-6(-3x-2)= | | 3d^2-48d-69=0 | | 16-3m=8 | | 12x-(4-3x)=5x+36 | | An=15+3(n-1) | | -67+23x=-12x+89 | | -2cx=6 | | -6b+4+4b=-3+9 | | -3+7p=8p-7-p | | -8y+6+9y=-17+y | | -2n-3(7n+7)=-8n+24 | | 7z-z=-1+2z-1-10 | | -4(4n+4)-5n=131 | | -.2857x+6+.1428x=18 | | 3(-x-4)+3x=12 | | 5y+7=31 | | 8v(v-3)= | | 37-7x=2(4+x)-7 | | -3+7p=8p-6-p |

Equations solver categories