Math, asked by gabrielleo, 4 hours ago

Subtract the sum of 12ab –10bc –18ac and 9ab + 12bc + 14ac from the sum of
ab + 2bc and 3bc – ac.

Answers

Answered by laliza10
5

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

Answered by shoaibkhan4201122
2

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

I hope it will help you Please mark me as Brainliest

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