Question

(B+7) (b-10) find it
By using identy

Answer 1

Answer:

b^2 - 10b + 7b - 70

b^2 - 3b - 70

.......................

Answer 2

Answer:

Step-by-step explanation:

(b+7)(b-10)

(b+7)(b-7-3)

(b+7)(b-7)-3(b+7)

Using (a+b)(a-b) = a²-b²

b²-49 - 3b -21        

b²-3b-70