Question

Find the value of x-2y+3z If x= 2a²-a³ +3a+4, y=2a³-3a²+2-2a, z=a+3a³-6-5a²​

Answer 1

According to question

x-2y+3z

2a²-a³+3a+4-2(2a³-3a²+2-2a)+3(a+3a³‐6-5a²)

2a²-a³+3a+4-4a³+6a²-4+4a+3a+9a³-18-15a

Rearranging

2a²+6a²-15a²-a³-4a³+9a³+3a+4a+3a+4-4-18

-7a²+4a³+10a-18