Question

plz plz say how do it ​

Answer 1

Answer:Same formula is used in both.Same formula is used in both.

Solution is:

a) 9x²+?+16

(a)²+2ab+(b)²=(a+b)²

(3x)²+2×3x×4+(4)²

c) ?+4ab+4

(a)²+2ab+(b)²=(a+b)²

(ab)²+2×ab×2+(2)²

so missing is ab²

Answer 2

Step-by-step explanation:

please refer the above two attachments friend...