Consider this option (see the attachment).
Note, that the formula (a+b)²=a²+2ab+b² is used.
Answer:
4/7
Step-by-step explanation:
There are 11 odd numbers less than or equal to 21.
There is 1 two.
11 + 1 = 12 ways
12 outcomes/ 21 total outcomes =
4/7
Answer: 1.36078
Step-by-step explanation:
6n²+5n=4
that is the equation
btw the number is either 1 or -4/3