Question

(9a - 4b) (9a2 + 4b2)

right one will mark as brainlist

Answer 1

Answer:

(9−4)(92+42)

9(92+42)−4(92+42)

9(92+42)−4(92+42)

813+362−4(92+42)

813+362−4(92+42)

813+362−362−163

813+362−362−163

813+362−163−362 ANS.