Question

(x+4 supra x-4) totul la a 2

+ formula dacă e

Answer 1

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Answer 2

$( \frac{x+4}{x-4})^2= \\ = \frac{(x+4)^2}{(x-4)^2}= \\ = \frac{x^2+8x+16}{x^2-8x+16} \\ Formule: \\ (\frac{a}{b})^2= \frac{a^2}{b^2} \\ (a+b)^2=a^2+2\cdot a \cdot b+b^2 \\ (a-b)^2= a^2-2\cdot a \cdot b+b^2$