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hey your answer are
3's i.No it have unlike terms.
ii.Yes it have like terms According to multiplicative property any number or variable is written 1st as 2nd and 2nd as 1st.
iii.No it have unlike terms.
iv.It have variables same but due to powers it is clearified as unlike.
v.It have like terms.
4's i.21b-32+7b-20b
-->21b+7b-20b-32
-->8b-32 Answer
ii.-z²+13z²-5x+7z³-15z
--->12z²-5x+7z³-15z. Answer
&I don't know more bcoz i am student of class 5th.
3's i.No it have unlike terms.
ii.Yes it have like terms According to multiplicative property any number or variable is written 1st as 2nd and 2nd as 1st.
iii.No it have unlike terms.
iv.It have variables same but due to powers it is clearified as unlike.
v.It have like terms.
4's i.21b-32+7b-20b
-->21b+7b-20b-32
-->8b-32 Answer
ii.-z²+13z²-5x+7z³-15z
--->12z²-5x+7z³-15z. Answer
&I don't know more bcoz i am student of class 5th.
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