Answer:
Step-by-step explanation:
x²+2 ×x×5+5²=-20x+2×x×5-3
(x+5)²=-20+10x-3
(x+5)²=-10x-3
The different group of 2 players that the coach can pick is 45 groups.
<h3>Selection of groups</h3>
The selection of groups of 2 player can be done using the method of combination.
<h3>Different groups of 2 players</h3>
The different group of 2 players that the coach can pick from the 10 players is calculated as follows;
n = 10C2

Thus, the different group of 2 players that the coach can pick is 45 groups.
Learn more about combinations here: brainly.com/question/25821700
Length of bc is 8
hope this helps :))
Answer:
9,9
Step-by-step explanation:
I don't think this is right but 64 ft.