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