Question

Упростите выражение -2/5(15a+1/2b)+1/5b

Answer 1

-2/5(15a+1/2b)+1/5b=-6a-1/5b+1/5b=-6a

Answer 2

$- frac{2}{5}(15a+ frac{1}{2}b ) + frac{1}{5}b=- frac{2*15a}{5}- frac{2*1}{5*2}b+ frac{1}{5}b=-6a- frac{2}{10}b+ frac{1}{5}b=-6a$