Question

please answer my question ​

Answer 1

solution:-

$p {}^{4} - 81$

$(p {}^{2} ) {}^{2} - (9) {}^{2}$

$(p {}^{2} + 9)(p {}^{2} - 9)$

$(p {}^{2} + 9)(p {}^{2} - 3 {}^{2} )$

$(p {}^{2} + 9)(p + 3)(p - 3)$

option B

solution:-

$121m {}^{2} - 49n {}^{2}$

$(11m) {}^{2} - (7n) {}^{2}$

$(11m + 7n)(11m - 7n)$

option C