Question

$(pqr - 3)(pqr +3)$
$(pqr - 3)(pqr + 3)$
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Answer 1

Answer:

To solve identity by (a+b)(a-b).

(pqr-3)(pqr+3)..

Answer 2

Answer:

$(pqr )^{2} - (3) {}^{2} = 0 \\ \ p {}^{2} \: q {}^{2} \: r \:{}^{2} - 9 = 0 \\ p {}^{2} q {}^{2} r { }^{2} = 9$