Question 588617
(7b+5)(2b-6)=0 

Either (7b+5)=0

OR (2b-6)=0 

(7b+5)=0

Add-5
7b=-5
/7
b=-5/7

(2b-6)=0 
add ^
2b= 6
/2
b=3

b= 3 or -5/7