1.

(1) 4 (p + c) (3a - b) + 6 (p+al (2-3)g. Factorise:ab-bc - ab + caxy + bcxy-az-bcz

Answer»

(i)ab²-bc²-ab+c²=ab²-ab-bc²+c²=ab(b-1)-c²(b-1)=(b-1)(ab-c²)



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