Question
Sat September 05, 2009 By: Subhash Sallan

if x2[square]+px+q=(x+a)(x+b)then factorise x2(square)+pxy+qy2(y square)

Expert Reply
Mon September 07, 2009

x2+px+q=(x+a)(x+b)=x2+(a+b)x+ab

p=a+b  and q =ab

x2+pxy+qy2 = x2  +(a+b)xy+aby2   = x2  +axy+bxy+aby2 = x(x+ay)+by(x+ay)=(x+ay)(x+by)

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