Question

if a+2b=3and ab=5 then a^2+4b^2=?​

Answer 1

Answer:lol

Step-by-step explanation:

Answer 2

(a+2b)^2 = a^2+4b^2+4ab

3^2 =a^2+4b^2+4(5)

a^2+4b^2 = -11