Subtract the sum of 12ab –10bc –18ac and 9ab + 12bc + 14ac from the sum of
ab + 2bc and 3bc – ac.
Answers
Answer:
Sum of 12ab-10b2 -18a2 and 9ab + 12b2 + 14a2
= 12ab – 10b2 – 18a2 + 9ab + 12b2 + 14a2
On combining the like terms,
= 12ab + 9ab – 10b2 + 12b2 – 18a2 + 14a2
= 21 ab +2b2 – 4a2
Sum of ab + 2b2 and 3b2 – a2 = ab + 2b2 + 3b2 – a2 = ab + 5b2 – a2
Now, subtracting 21ab + 2b2 – 4a2 from ab + 5b2 – a2, we get = (ab + 5b2 – a2) – (21ab + 2b2 – 4a2)
= ab+ 5b2 – a2 – 21ab – 2b2 + 4a2
On combining the like terms,
= ab – 21ab + 5b2 – 2b2 – a2 + 4a2
= – 20ab + 3b2 + 3a2 = 3a2 + 3b2 –
the answer is correct
i hope this will be helpfull for youu
Step-by-step explanation:
We have,
12ab-10bc-18ac+9ab+12bc+14ac
=21ab+2bc-4ac
Again,
ab+2bc+3bc-ac=ab+5bc-ac
Therefore, (ab+5bc-ac)-(21ab+2bc-4ac)
=ab+5bc-ac-21ab-2bc-4ac
=3bc-20ab-5ac