Question

find the square of 1) 3a-7b ​

Answer 1

Answer:

(3a - 7b) ^2

(3a) ^2 +(7b) ^2 - 2× 3a × 7b

9a^2 + 49b^2 - 42ab

Answer 2

Answer:

9a^2 -42ab + 49b^2

Step-by-step explanation:

use the formula (a-b)^2= a^2 -2ab+ b^2