(R-2)(R+12)=1

Simple and best practice solution for (R-2)(R+12)=1 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-2)(R+12)=1 equation:


Simplifying
(R + -2)(R + 12) = 1

Reorder the terms:
(-2 + R)(R + 12) = 1

Reorder the terms:
(-2 + R)(12 + R) = 1

Multiply (-2 + R) * (12 + R)
(-2(12 + R) + R(12 + R)) = 1
((12 * -2 + R * -2) + R(12 + R)) = 1
((-24 + -2R) + R(12 + R)) = 1
(-24 + -2R + (12 * R + R * R)) = 1
(-24 + -2R + (12R + R2)) = 1

Combine like terms: -2R + 12R = 10R
(-24 + 10R + R2) = 1

Solving
-24 + 10R + R2 = 1

Solving for variable 'R'.

Reorder the terms:
-24 + -1 + 10R + R2 = 1 + -1

Combine like terms: -24 + -1 = -25
-25 + 10R + R2 = 1 + -1

Combine like terms: 1 + -1 = 0
-25 + 10R + R2 = 0

Begin completing the square.

Move the constant term to the right:

Add '25' to each side of the equation.
-25 + 10R + 25 + R2 = 0 + 25

Reorder the terms:
-25 + 25 + 10R + R2 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + 10R + R2 = 0 + 25
10R + R2 = 0 + 25

Combine like terms: 0 + 25 = 25
10R + R2 = 25

The R term is 10R.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10R + 25 + R2 = 25 + 25

Reorder the terms:
25 + 10R + R2 = 25 + 25

Combine like terms: 25 + 25 = 50
25 + 10R + R2 = 50

Factor a perfect square on the left side:
(R + 5)(R + 5) = 50

Calculate the square root of the right side: 7.071067812

Break this problem into two subproblems by setting 
(R + 5) equal to 7.071067812 and -7.071067812.

Subproblem 1

R + 5 = 7.071067812 Simplifying R + 5 = 7.071067812 Reorder the terms: 5 + R = 7.071067812 Solving 5 + R = 7.071067812 Solving for variable 'R'. Move all terms containing R to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + R = 7.071067812 + -5 Combine like terms: 5 + -5 = 0 0 + R = 7.071067812 + -5 R = 7.071067812 + -5 Combine like terms: 7.071067812 + -5 = 2.071067812 R = 2.071067812 Simplifying R = 2.071067812

Subproblem 2

R + 5 = -7.071067812 Simplifying R + 5 = -7.071067812 Reorder the terms: 5 + R = -7.071067812 Solving 5 + R = -7.071067812 Solving for variable 'R'. Move all terms containing R to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + R = -7.071067812 + -5 Combine like terms: 5 + -5 = 0 0 + R = -7.071067812 + -5 R = -7.071067812 + -5 Combine like terms: -7.071067812 + -5 = -12.071067812 R = -12.071067812 Simplifying R = -12.071067812

Solution

The solution to the problem is based on the solutions from the subproblems. R = {2.071067812, -12.071067812}

See similar equations:

| 2(-36)-7= | | 4(7+w)=3(6+w) | | 24x-22=-4(1-6) | | 24x-22=-4(1-6) | | X/x-6+2=6/x-6 | | A/6+1=8 | | 2k^2-8k+8=0 | | -4(w-5)+6w+3= | | -g=-8 | | -4j-(-5)/-7=14 | | -4g/7=-84 | | 3a-(1.4a-1.08)=47.48 | | 60.00x=11.00 | | 54+5p-9+3p=29-12+19p-4p | | 1/3(-36-15) | | -18-21r/-12 | | 0=2r | | 3.0x=5.0 | | 1/3(c-15)=2c-7 | | 3y-yo=2z | | 1/3-1/2=-2 | | -6x+3y=21 | | 4x+2y=-16 | | X+23+3x=-22-3x-25 | | 9x^3+10x^2-16x=0 | | 25-.04x=0 | | 2x-3y=11.5 | | 5x+13=15x-29 | | Y-4=-2(x-8) | | x-4-5=-8 | | 1/3(x-15)=2x-7 | | .5(4x+20)=12 |

Equations solver categories