r(r+4)-4(r+4)=

Simple and best practice solution for r(r+4)-4(r+4)= 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+4)-4(r+4)= equation: 


Simplifying
r(r + 4) + -4(r + 4) = 0

Reorder the terms:
r(4 + r) + -4(r + 4) = 0
(4 * r + r * r) + -4(r + 4) = 0
(4r + r2) + -4(r + 4) = 0

Reorder the terms:
4r + r2 + -4(4 + r) = 0
4r + r2 + (4 * -4 + r * -4) = 0
4r + r2 + (-16 + -4r) = 0

Reorder the terms:
-16 + 4r + -4r + r2 = 0

Combine like terms: 4r + -4r = 0
-16 + 0 + r2 = 0
-16 + r2 = 0

Solving
-16 + r2 = 0

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '16' to each side of the equation.
-16 + 16 + r2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + r2 = 0 + 16
r2 = 0 + 16

Combine like terms: 0 + 16 = 16
r2 = 16

Simplifying
r2 = 16

Take the square root of each side:
r = {-4, 4}

See similar equations:

| p(p-2)+4(p-2)= | | x-4540=40 | | Y=150+0.7(Y-200)+50+0.2Y+200 | | x(x+2)+3(x+2)= | | -7(x-3)=63 | | 342+x=442 | | 8(2+z)-5(3-2z)= | | 2-3x=5x-2(x+8) | | 3(4-5a)-2(5-4a)= | | x-240=10 | | 4(y-6)-5(3y-1)= | | 7-2(x-4.5)=6-4x | | 6(3a+5)-3(2a-5)= | | 14+x=25 | | 2x+4y-7=0 | | 11(t+1)+2(t+5)= | | 2(a+1)+3(a+2)= | | a^2-a^2=a^4-1 | | 10x=570 | | 3y-20=7 | | 2x+4x+4x=50 | | 2(5)-10= | | 2(3)-10= | | 11x^2-34x+3=0 | | 11x^2-34x+13=0 | | 3/(3x)-1/(x+1)=1 | | 4w=w-(w-8) | | 1785y+140p-679y= | | 1/4x-32 | | 17+4x=33 | | 4(x-8)=-2 | | 30-5y=10 |

Equations solver categories