Question

expand using identity
a) (2a-5b)²
b)7³-10+3³

please answer​

Answer 1

Answer:

a) (2a-5b)²

(2a)²+(5b)²-2×2×-5

4a²+25b²+20

b)7³-10+3³

343-10+27

333-27

306

Answer 2

Answer:

Plz make me brainlist

I hope it is helpful ✌️