1) (a-5)/(a^2-25) = (a-5)/((a-5)(a+5)) = 1/(a+5)2) (m^2-16)/(m^2+8m+16) = (m^2-16)/((m+4)^2) = (m-4)(m+4)/(m+4)(m+4) = (m-4)/(m+4)3) (b^5-b^3)/(b^2-b^4) = b^3(b^2-1)/(b^2(1-b^2)) = b^3(b+1)(b-1)/(b^2(1+b)(1-b)) = b(b+1)/(b(1+b)) = 1
1) (a-5)/(a^2-25) = (a-5)/((a-5)(a+5)) = 1/(a+5)
2) (m^2-16)/(m^2+8m+16) = (m^2-16)/((m+4)^2) = (m-4)(m+4)/(m+4)(m+4) = (m-4)/(m+4)
3) (b^5-b^3)/(b^2-b^4) = b^3(b^2-1)/(b^2(1-b^2)) = b^3(b+1)(b-1)/(b^2(1+b)(1-b)) = b(b+1)/(b(1+b)) = 1