Dr. Sanjeev Verma and R.K. Tyagi Solutions for Chapter: Algebraic Expressions, Exercise 4: ASSIGNMENT 4.4

Add the following by both horizontal and column methods

$3x+2y$ and $x+y$

Add the following by both horizontal and column methods.

$2x+3y+z$ and $2x-y-z$

Subtract $5x$ from $9x$.

Subtract $-3a$ from $7a$

Subtract by the column method

$x^2+y^2$ and $5x^2-3y^2$

Subtract by the column method:

$a^2-3ab$ and $2a^2-7ab$

From the sum of $3x+2y+3z$ and $3x-4y+5z$ subtract the  $6x+7y-2z$ .
 

What should be added $a^2+2ab+b^2$ to obtain $4ab+b^2$.