Answer:
7(x-1)(x+5)
Step-by-step explanation:
7x^2+28x-35= ( 28x=35x-7x)
7x^2-7x+35x-35=
7x(x - 1)+35(x - 1)=
(x - 1)(7x+35)=
(x - 1)(7x+7*5)=
(x - 1)7(x+5)=
