Helppppppppppppppppppppppppppp me plz

Mathematics

1 answer:

Anit [1.1K]3 years ago

6 0

Yes they are equivalent expressions. If you take the z to the power of two, and subtract that from the other z to the power of two, it is zero. So you are left with four which is the answer

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Each user has a password 6 characters long where each character is an uppercase letter, a lowercase letter, or a digit. Each pas

Lana71 [14]

Answer:

$36^{6} -26^6$

Step-by-step explanation:

We have 36 characters in total which we can use in order to form a 6 character password.

For each place in this password we have choice of 36 of them, so, the total number of possible passwords of 6 characters is:

$36*36*36*36*36*36=36^6$

But, we have to exclude all passwords which have no numbers because, by the task, the password must contain at least one digit.

So, now we have choice of 26 characteristic to form password without digits and get $26^6$ passwords like that, contained just of letters without digits.