The length of a rectangular field is represented by the expression 14x-3x2 + 2y. the width of the field is represented by the
expression 5x-7x2 + 7y. how much greater is the length of the field than the width?
9x+4x2 - 5y
9x-10x2 - 5y
19x+4x2+9y
19x-10x2 +9y
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first the equation needs to be simplified. so the equation would now look like:   52-24+11

then you multiply.

and when you multiply, you will get the answer of 39.  

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?

i was unable to find the answer. good