Question 63516
{{{x^2 + y^2 - 2xy}}} 
{{{x^2 - 2xy + y^2}}} 
{{{(x-y)(x-y)}}} 
{{{(x-y)^2}}} 


Question 2
If the width is x then the length must be 3 x. The area will then be 3x^2.

But the area is actually 588 in^2.
{{{3x^2=588}}}
{{{3x^2/3=588/3}}}
{{{x^2=196}}}
{{{x=sqrt(196)}}}
Width = 14 inches and length = 42 inches


Question 3
if the first number is x then the next odd number will be x+2
{{{x^2+(x+2)^2=130}}}
{{{x^2+x^2+4x+4=130}}}
{{{2x^2+4x+4=130}}}
{{{2x^2+4x+4-130=130-130}}}
{{{2x^2+4x-126=0}}}
{{{x^2+2x-63=0}}}
{{{(x+9)(x-7)=0}}}
So x=7 or x=-9
The two numbers are 7 and 9 or -9 and -7.