" 15."a^(2)-b^(2)-a-b

if (a+b):(a-b)=15:1, then the value of (a^(2)-b^(2))/(a^(2)+b^(2)) is:

If (15a^(2)+4b^(2))/(15a^(2)-4b^(2))=(47)/(7) then find the values of the following (i) (a)/(b) (ii) (7a-3b)/(7a+3b) (iii) (b^(2)-2a^(2))/(b^(2)+2a^(2))

Factorise 12a^(2)b+15ab^(2)

Find the degrees of the following polynomials 15a^2b^2-a^5+b^4-a^4b+18

If (15a^2+4b^2)/(15a^2-4b^2) = 47/7 then find the value of the ratio : a/b

If (a+b):(a-b)=15:1 then the value of a^(2)-b^(2) is: