Question

pls answer its urgent i will mark brainliest​

Answer 1

Step-by-step explanation:

As we know

$(a - b) (a + b) \\ a ^{2} - {b}^{2}$

then

${s}^{2} - {t}^{2} + {t}^{2} - {p}^{2} + {p}^{2} - {s}^{2} \\ = 0$