Ineed with. multiplication is there a 8 x s table trick

Here's the 8's times tables:
8x1=8
8x2=16
8x3=24
8x4=32
8x5=40
8x6=48
8x7=56
8x8=64
8x9=72
8x10=80
8x11=88
8x12=96
Okay, so here's a few tricks I've learned in elementary school.
For ones, whatever you multiply by one is itself.
For twos, just count on 8 fingers by 2
For fives, just count on 8 fingers by 5
For nines, you hold up all ten of your fingers in front of you and, for example, if a question was 9x3, then on your left hand you'd put down your middle finger( the third finger) and you see two fingers and then there's a space, and there's seven fingers on the other side of the space. The answer is 27! Ta-da
All times tables are is just pure memorization. Hope I helped a LOT!

X^2 - 4x +(4/2^2) + y^2 + 8y + (8/2^2) = -4 + (4/2^2) + (8/2^2)(x + 2)^2 + (y + 4)^2 = -4 + 4 + 16your center is (-2, -4) and the radius is the sqrt of -4 + 4 + 16 which is 4