Question

show that :(p-q-r)²=p²+q²+r²+2pq+2qr-2rp
solve it properly using suitable identity​

Answer 1

its a very simple

Step-by-step explanation:

(p-q-r)² = p+²q²+r²+2pq-2qr-2rp

a²+b²+c²+2ab-2bc-2ca

p²+q²+r²+2pq -2qr - 2pr

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Answer 2

Answer:

Here (p-q-r)² = ( a-b-c)²

( a-b-c)² = -2ab-2ac+a²+b²+2bc+c²

hence (p-q-r)² = -2pq-2pr+p²+q²+2qr+r²