using identities find the value of
[tex](39) {}^{2} [/tex]
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2 thoughts on “using identities find the value of<br />[tex](39) {}^{2} [/tex]<br />​”

1. ANSWER :

   [tex] {39}^{2} = {(40 – 1)}^{2} \\ = {40 }^{2} – 2(40)(1) + {1}^{2} \\ = 1600 – 80 + 1 \\ = 1521[/tex]

   FINAL ANSWER :

   1521

   NOTE :

   FORMULA :

   [tex] {(a – b)}^{2} = {a}^{2} – 2ab + {b}^{2} [/tex]

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2. [tex](39) {}^{2} [/tex]

   [tex]1521[/tex]

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