Question

answer the following question ​

Answer 1

Answer:

Here are the answers in the attachment

Answer 2

Let me write each set in roster form.

$\displaystyle\longrightarrow\sf{A=\{1,\ 2,\ 5,\ 10\}}$

$\displaystyle\longrightarrow\sf{B=\{5\}}$     [-1 can't be because x is a whole number]

$\displaystyle\longrightarrow\sf{C=\{2\}}$

$\displaystyle\longrightarrow\sf{D=\{0,\ 1,\ 2,\ 3,\ 4,\ 5\}}$

Now,

$\displaystyle\longrightarrow\sf{\underline{\underline{A-C=\{1,\ 5,\ 10\}}}}$

And,

$\displaystyle\longrightarrow\sf{\underline{\underline{B-D=\phi}}}$

If set builder form is required,

$\displaystyle\longrightarrow\sf{\underline{\underline{A-C=\{x:x\ is\ a\ factor\ of\ 10\ which\ is\ not\ an\ even\ prime\ number\}}}}$

$\displaystyle\longrightarrow\sf{\underline{\underline{B-D=\{x:x\ is\ a\ root\ of\ x^2-4x-5=0\ and\ x\ \textgreater\ 5,\ x\in\mathbb{W}\}}}}$