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sum and difference of the binomials (9-s²+²)(9+s²+²)​

Sagot :

Mikorazid

[tex]81 - {s}^{4} {t}^{4} [/tex]

Using FOIL Method

[tex](9 - {s}^{2} {t}^{2} )(9 + {s}^{2} {t}^{2} ) \\ = 81 + 9 {s}^{2} {t}^{2} - 9 {s}^{2} {t}^{2} - {s}^{4} {t}^{4} \\ = 81 - {s}^{4} {t}^{4} [/tex]