Answer :
Easy peasy!
4n2+5−−2n2−4
=4n2+5+2n2+−4
Combine Like Terms:
=4n2+5+2n2+−4
=(4n2+2n2)+(5+−4)
=6n2+1
Answer:=6n2+1
4n2+5−−2n2−4
=4n2+5+2n2+−4
Combine Like Terms:
=4n2+5+2n2+−4
=(4n2+2n2)+(5+−4)
=6n2+1
Answer:=6n2+1
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