Question

the sum of 3 expressions is 8+13a+7a2 two of them are 2a2+3a+2 and 3a2-4a+1 find the third expression​

Answer 1

Answer:

5+14a+2a2

Step-by-step explanation:

(8+13a+7a2)-((2a2+3a+2)+(3a2-4a+1))

8+13a+7a2-(5a2-a+3)

8+13a+7a2-5a2+a-3

5+14a+2a2

Answer 2

Answer:

5 + 14a + 2a^2

Step-by-step explanation:

Given -

the sum of 3 expressions is 8+13a+7a^2

two of them are 2a^2+3a+2 and 3a^2-4a+1

To find - 3rd expression

Solution :-

First we will add the given two expressions,

= 2a^2+3a+2 + 3a^2-4a+1

= 5a^2 - a + 3

Now , we will subtract the sum of 2 expressions from the sum of 3 expressions

8+13a+7a^2 - (5a^2 - a + 3 )

8 + 13a + 7a^2 - 5a^2 + a - 3

5 + 14a + 2a^2

5 + 14a + 2a^2

This is the 3rd expression..