Question

What should be added to 2a³-3ab²+5-9b² to get 11ab²-8a²-6b²+9.​

Answer 1

Answer:

2a³-3ab²+5-9b² + x = 11ab²-8a²-6b²+9

x = 11ab²-8a²-6b²+9 - ( 2a³-3ab²+5-9b²)

x = 11ab²-8a²-6b²+9 - 2a³+3ab²-5+9b²

[ -,-=+]

[+,+=+]

[-,+=-]

[+,-=-]

x= 2a³+11ab²+3ab²-6b²+9b²+9-5

x=2a³+8a²+11ab²+3ab²-6b²+9b²+9-5

x= 2a³+8a² + 14ab²+3b²+4(Answer)