WAEC - Mathematics (2004 - No. 23)
Factorise 27p2x2 - 48y2.
9(3px - 4y)2
3(3px - 4y)(3px - 4y)
9(px - 4y)(3p x + 4y)
3(3px -4y)(3px +4y)
คำอธิบาย
27p2x2 - 48y2; 3(32 p2x2-42y2)
3[(3px) 2 - (4y) 2]; 3[(3px-4y)(3px+4y)]
3[(3px) 2 - (4y) 2]; 3[(3px-4y)(3px+4y)]