Question

математика a^2-16b^2/a^2:ab-4b^2/a при a=75 b=15

Answer 1

$frac{a^2-16b^2}{a^2}: frac{ab-4b^2}{a}=frac{(a-4b)(a+4b)}{a^2}* frac{a}{b(a-4b)}= frac{a+4b}{ab} \ frac{a+4b}{ab}=frac{75+4*15}{75*15}= frac{75+60}{75*15}= frac{135}{75*15}= frac{9}{75}=0.12$