Please solve 21,23,25,26,27 factorise them Share with your friends Share 0 Shilpa Patel answered this -1 View Full Answer Lokesh Bansal answered this 21factor 7 0 Avni answered this Dear student, 21. x3-x= x(x2-1)= x(x+1)(x-1) 23. 3x3y-243xy3 = 3xy(x2-81y2) = 3xy(x-9y)(x+9y) 25. x4-y4 = (x2-y2)(x2+y2) = (x-y)(x+y)(x2+y2) I hope that you now get the method and can try solving the rest of them. If not please inform. Regards 1
