Question

3a+2b=23and ab=30 find 9a ^2+4b^2

Answer 1

here is your answer,

9a^2+ 4b^2

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

= (3a+2b)^2 -2ab

= (23)2 -2.30

= 529-60

= 469

Answer 2

hope it will help u .