In addition substitute

and get cubic equation in x. As one value is already known as 5/2 it can be reduced to quadratic equation and can be solved.]]>

7 is prime so only factorable by 1 or 7.

the only squares less than 6 are 1 and 4 therefore a=1, r=2

a=7, r=0

73 is prime so only factorable by 1 or 73. 73 too big so must be 1. Only smaller than 73 is r= 1 or 2. 1 is too small so a=1, r=2.

You seem to implicitly assume that a is an integer, because for a,r€R there are a lot more possiblities than your first few lines mention.

]]>7 is prime so only factorable by 1 or 7.

the only squares less than 6 are 1 and 4 therefore a=1, r=2

a=7, r=0

73 is prime so only factorable by 1 or 73. 73 too big so must be 1. Only smaller than 73 is r= 1 or 2. 1 is too small so a=1, r=2.]]>

Due to teacher complaints about cheating and copyright violation we are restricted in how much and what type help we can give for homework questions.

Do you have some work of your own that I can improve or help on? If you show some work, some effort, then you can be helped. It is as simple as that.

]]>Source: Trial and error (it's a punishment for those who haven't shown any effort)]]>

]]>