Answer:
Step-by-step explanation:
The question relates with rules of indices
(a) The give expression is presented as follows;
By expanding the expression, we get;
Collecting like terms gives;
(b) The given expression is presented as follows;
Therefore, we get;
Collecting like terms gives;
long way
12 x 11 x 10 x 9 x 8 x 7 x6 x5 x4 x3x2/ 10x9x8x7x6x5x4x3x2x
but you can shorten that by crossing out identical numbers so you get 12 x 11
12 x 11 = 132 combinations
Answer:
The rink is 20.75 ft longer
Step-by-step explanation:
Simply subtract the width from the length.
72.25-51.5= 20.75 ft
Square the binomial I guess
