Add the following algebraic expressions:

(i) 3a² b,-4a²b,9a² b

24 Evaluate . 1

Identify the terms, their coefficients for each of the following expressions.

(i) (ii)

3

Subtract:

(i) -5xy from 12xy

(ii) 2a² from -7a²

4

Subtract 3x-4y-7z from the sum of x-3y+2z and -4x+9y-11z.