c) 14x2y-21xy2+28x2y2
=7xy(2x-3y+4xy)
d) 2/5x(y-1)-2/5y(y-1)
=2/5(y-1)(x-y)
c) 14x2y-21xy2+28x2y2
= 7xy ( 2x - 3y + 4xy )
d) \(\frac{2}{5}\)x(y-1) - \(\frac{2}{5}\)y(y-1
= \(\frac{2}{5}\) ( y - 1)( x - y )
d) \(\frac{2}{5}x\left(y-1\right)-\frac{2}{5}y\left(y-1\right)\)
= \(\left(y-1\right)\left(\frac{2}{5}x-\frac{2}{5}y\right)\)