Question

Fill in the blank
( ___-2a)^2=9b^2-___+___

Answer 1

(3b-2a)^2=9b^2-12ab+4a^2

Explanation:

Using the formula (a-b)^2=a^2-2ab-b^2, you can plug in the values to get your answer. (Sorry I can't really explain more, it's just using the formula. Hope this helps)