Question

ПОМОГИТЕ решить 2 задания

Answer 1

(a-1)²=a²-2a+1

$frac{0.15-0.15*6.4}{0.175- frac{3}{8} } = frac{0.15-0,96}{0.175- 0,375 } = frac{-0,81}{-0.2} = frac{0,81}{0.2} = frac{81}{20}=4 frac{1}{20} =4.05$