Question

упростите выражение:(b+8)(b-6)-(b-7)(b+7)

Answer 1

(b+8)(b-6)-(b-7)(b+7)=b²-6b+8b-48-(b²-49)=b²+2b-48-b²+49=2b+1

Answer 2

(b+8)(b-6)-(b-7)(b+7)=b²+8b-6b-48-b²+49=2b+1