add 6a-a²
, 3a²+ 8 a and -15a+a²
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Answer:
First Add,
(3a²-5a+5)+ (a³-5a²+8)
= 3a²-5a+5+a³-5a²+8
= a³+3a²-5a²+5+8
= a³-2a²+13
And now,
Subtract a³-2a²+13 from 7a²-4a²-9
= 7a²-4a²-9 - (a³-2a²+13)
= 7a²-4a²-9-a³+2a²-13
= - a³+7a²-4a²+2a²-9-13
= - a³+5a²-22 ans.✅✅
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