Q. 15.0( 1 Vote )

Always keep in mind to add like terms.
The remaining terms are kept as it is:
Like terms are those which have same variables and the variables
have same power.
Now in
The coefficient of x2 will be added as:
11 + 6 = 17
The coefficient of x will be added as:
- 8 + 7 = -1
The constant terms will be added as:
4 + (-10) = 4 - 10
= - 6
Hence,
(11x2 - 8x + 4) + ( 6x2 + 7x - 10)
= 17 x2 - x - 6
Also we can do the addition by the method below:

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