Question

guys Ye wala please answer me ​

Answer 1

Answer:

Option d) None

Step-by-step explanation:

$(3a + 8b - 7c) + (7a - 9b + 6c) + ( - 3 + a - 2b) \\ \\ = 3a + 8b - 7c + 7a - 9b + 6c - 3c + a - 2b \\ \\ = 3a + 7b + a + 8b - 9b - 2b - 7c - 3c + 6c \\ \\ = 11a + 8b - 11b - 10c + 6c \\ \\ = 11a - 3b - 4c$

The above question is to add polynomials.

How to add polynomials?

You add polynomials when there are plus signs. You subtract them when there is a minus sign. Remember to add/subtract like terms within the polynomial.

Answer 2

Given Question :

Add:

$\sf { 3a +8b-7c, 7a-9b+6c,-3c+a-2b}$

Required Solution :

$\sf { 3a +8b-7c, 7a-9b+6c,-3c+a-2b}$

$\sf { \leadsto 3a +8b-7c + 7a-9b+6c + (-3c+a-2b) }$

$\sf { \leadsto 3a +8b-7c + 7a-9b+6c -3c+a-2b }$

$\sf { \leadsto 3a +7a+a+8b-9b-2b-7c+6c-3c }$

$\sf { \leadsto 10a+a-b-2b-c-3c }$

$\sf\red { \leadsto 11a-3b-4c }$

How did we solve it?

In step 1st - We put the "+" sign in the place of comma, as we have to find sum.

In step 2nd - We removed thebrackets i.e there was sign of plus before the terms in the bracket thus we multiplied "+" with all the terms.

In step 3rd - We collected all the like terms.

In step 4th - We performed addition.

In step 5th - We got the final answer!

Therefore, Option D is correct.

$\boxed {\large \rm \purple Option \: D!!}$

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