Lisa's desk is 46 1/2 in wide. her bookcase is 30 in wide . if she puts both of them against the wall so that is 98 in wide , how much space will be left for a file cabinet

he answer is x=1x3 because x=1 to x=3

answers

\3. yes the presentation (i.e. odd numbers being written as differences of two squares) is possible for all odd natural number however the presentation may not be unique. for example,  57=112−82=292−28257=112−82=292−282.

\4. 2 can't be written as a difference of two squares because 4-1=3 and 1-1=0 and the difference of squares grows to integers larger that 3.

can i get some in proving questions 1 and 2?

if p is true and q is false, then p ∨ q is true