Question

ПОМОГИТЕ С ПРИМЕРОМ: 6b²-(2b+5) (3b-7)

Answer 1

$6b^{2}-(2b+5)(3b-7)=$$=6b^{2}-2b*3b-5*3b+2b*7+5*7=$

$=6b^{2}-6b^{2}-15b+14b+35=35-b$