Question

If A = m2 + 5 , B = m-4 , C= 9+m2 find thé value of 2A + 2B - C.

Answer 1

Multiplying both sides by 2

So, 2A=4m+10

Now,in eq. B,

Multiplying both sides by 2

So, 2B=2m-8

We have to find 2A+2B-C

4m+10+2m-8-(9+2m)

6m+2-9-2m

4m-7