35k^2 -22k+7=4 35k^2 -22k+7-4=4-4 35k^2 -22k+3=0 (5k )(7k ) ( -1)( -3) (5 k-1) (7 k-3) = 0 Solve: (5 k-1)=0 5k-1+1=0+1 5k=1 5k/5=1/5 k=1/5 Solve: (7 k-3) = 0 7k-3+3=0+3 7k=3 7k/7=3/7 k=3/7