Question

Упростите выражение (6b−8)(8b+6)−8b(6b+8) и найдите его значение при
b=−8,2.

Answer 1

(6b-8)(8b+6)-8b(6b+8)=48b²+36b-64b-48-48b²-64b=-92b-48
-92*(-8.2)-48=754.4-48=706.7

Answer 2

(6b−8)(8b+6)−8b(6b+8)=48b²-64b+36b-48-48b²-64b=-92b-48
b=−8,2
-92*(-8,2)-48=754,4-48=706,4