Question

who answers my question I will mark them as brainliest and I will follow them ​

Answer 1

Answer:

if u are in 9th class then you can check the RS Aggarwal book in that it is explained nicely

Answer 2

PROVED BELOW ↓↓↓

p³+q³+r³-3pqr = (p+q+r)(p²+q²+r²-pq-qr-rp)

Step-by-step explanation:

Taking RHS and LHS

RHS = (p+q+r)(p²+q²+r²-pq-qr-rp)

multiplying.. We get,

=p(p²+q²+r²-pq-qr-rp) +q(p²+q²+r²-pq-qr-rp) +r(p²+q²+r²-pq-qr-rp)

= p³+pq²+pr²-p²q-pqr-rp²+p²q+q³+qr²-pq²-q²r-pqr +p²r+q²r+r³-pqr-qr²-r²p

after cancellation of terms, we get

= p³+q³+r³-3pqr

= LHS

LHS = RHS

HENCE PROVED

Therefore,

p³+q³+r³-3pqr = (p+q+r)(p²+q²+r²-pq-qr-rp)

Mark me Brainliest ^_^