Question

find the missing factor 7y^2-10y+3 = (7y-3) ( )

Answer 1

(y-1)
to get +3 you need to times -3 by -1
to get 7y^2 you need to time 7y by y

Answer 2

To find the missing factor:
${7y}^{2} - 10y + 3 \\ by \: cross \: method \\ (y - 1)(7y + 3)$
thus the answer is (y-1)