3<(13)^1/2< 4, deduce that 0<(13)^1/2 -3<1

b) [(13^1/2)+3]^4 + [(13^1/2)-3)]^4 =1904

c)1903<[(13^1/2)+3]^4 <1904

here is another question

expresss [(p^1/2 +q(r^1/2)]^2 in the form =a+b(c^1/2). without evaluating the square root or using table or calculator,show that 10^1/2 +2(2^1/2) <6