r(r+14)=2

Simple and best practice solution for r(r+14)=2 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 r(r+14)=2 equation:


Simplifying
r(r + 14) = 2

Reorder the terms:
r(14 + r) = 2
(14 * r + r * r) = 2
(14r + r2) = 2

Solving
14r + r2 = 2

Solving for variable 'r'.

Reorder the terms:
-2 + 14r + r2 = 2 + -2

Combine like terms: 2 + -2 = 0
-2 + 14r + r2 = 0

Begin completing the square.

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + 14r + 2 + r2 = 0 + 2

Reorder the terms:
-2 + 2 + 14r + r2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + 14r + r2 = 0 + 2
14r + r2 = 0 + 2

Combine like terms: 0 + 2 = 2
14r + r2 = 2

The r term is 14r.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14r + 49 + r2 = 2 + 49

Reorder the terms:
49 + 14r + r2 = 2 + 49

Combine like terms: 2 + 49 = 51
49 + 14r + r2 = 51

Factor a perfect square on the left side:
(r + 7)(r + 7) = 51

Calculate the square root of the right side: 7.141428429

Break this problem into two subproblems by setting 
(r + 7) equal to 7.141428429 and -7.141428429.

Subproblem 1

r + 7 = 7.141428429 Simplifying r + 7 = 7.141428429 Reorder the terms: 7 + r = 7.141428429 Solving 7 + r = 7.141428429 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + r = 7.141428429 + -7 Combine like terms: 7 + -7 = 0 0 + r = 7.141428429 + -7 r = 7.141428429 + -7 Combine like terms: 7.141428429 + -7 = 0.141428429 r = 0.141428429 Simplifying r = 0.141428429

Subproblem 2

r + 7 = -7.141428429 Simplifying r + 7 = -7.141428429 Reorder the terms: 7 + r = -7.141428429 Solving 7 + r = -7.141428429 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + r = -7.141428429 + -7 Combine like terms: 7 + -7 = 0 0 + r = -7.141428429 + -7 r = -7.141428429 + -7 Combine like terms: -7.141428429 + -7 = -14.141428429 r = -14.141428429 Simplifying r = -14.141428429

Solution

The solution to the problem is based on the solutions from the subproblems. r = {0.141428429, -14.141428429}

See similar equations:

| (6x-45)=90 | | N^2+6n-8=8 | | ln(x)=3/5 | | (x/4)/3=2 | | -32=2(x^2+10x) | | 42w^2+x-30=0 | | 7w-3=8w+2 | | (7u+4)(2u^2-5u+3)= | | (1/3)=(3/5)/x | | 3x*6=1 | | 4y+y^2=10 | | x/6=1/12=x/8 | | 27y^2+18y=0 | | K/7=25 | | 4a+2=6a-7 | | -5x+45+11x+21=90 | | 5x+7y-11z= | | 115/-5 | | 3x^2+17x-6.9=0 | | 6*m=5280 | | 2(x-5)-3(2x+4)= | | 4x=.25 | | 7t-(-t-5)=6t+5 | | 9x^3+6x^2-119x=0 | | Y=-x^2+36 | | 5x=1/625 | | 5n^2-6=-28 | | 0=-x^2+36 | | 2/3(6x-12)=20 | | (7a)+16-(3a)=-4 | | 9x^3+6x^2+x=120 | | 4x(x+8)(2x+3)=0 |

Equations solver categories