Because the surface area is of a 2-D SHAPE to find a area of a 2-D shape is l x w
First you need 0 on the right side of the equation so you subtract x
you get x^2 - x - 6 = 0
you can factor this into (x-3)(x+2) = 0
x = 3,-2
Ans B
Answer: B
You use pemdas to solve and also the GCF in this case is 7