Question

class 7th
ch- algebraic expressions

Q1) Add the following expressions:-
add this in full explanation ​

Answer 1

f) (p^2 qr + pq^2 r + pq )+(-3pq^2 r - 2pqr^2)

= p^2 qr + pq^2 r + pq - 3pq^2 r - 2pqr^2

= p^2 qr - 2pq^2 r + pq - 2pqr^2 ans

g) (uv - vw )+( vw - wu )+( wu - uv)

= uv - vw + vw - wu + wu - uv

= 0 ans

h) ( a^2 +3ab- bc) + ( b^2 +3bc -ca)+(c^2+ 3bc - ab)

= a^2 + 3ab - bc + b^2 + 3bc - ca + c^2 + 3bc -ab

= a^2 + 2ab + 5bc + b^2 -ca + c^2 ans