Question

find the sum with column method

5px + 7q- r; 2px + 3r and - px + 2q + r
5. Subtract : (i) – 6x2 from x2 (ii) x + y from 2x + 3y.
(iii) 5x – 3y - 4 from 8x - 7y + 5
6. Subtract : 24ab - 10b - 18a from 30ab + 12b + 14a.
7. From the sum of 2y2 + 3yz, - y2 - yz – 22 and yz + z2 subtract the
sum of 3y2, z2 and - y + yz + z2
8. Subtract the sum of 2m - In + p from the sum of m - n + p and
3m - 2n - 2p. ​

Answer 1

Answer:

5px +7q -r

2px +3r

- px +2q +r

+_________

6px+9q+3r

_________

(i)-x²-(-6x²)

= -x²+6x²

= 5x²

(ii)2x+3y

x+ y

- -

________

x +2y

__________

(iii)8x-7y+5

5x-3y -4

- + +

_________

3x -4y +9

__________

30ab+12b+14a

24ab -10b-18 a

_ + +

____________

6ab+22b+32a

____________