1. Factorise the following ex(a) x2 +9x + 20 – InterviewSolution

1.

1. Factorise the following ex(a) x2 +9x + 20

Answer»

x^2+5x+4x+20=X(X+5)+4(X+5)=(X+5)(X+4 ) is the correct answer of the given question

x²+9x+20=0sum=9: product=20number=5,4x²+5x+4x+20=0x(x+5)+4(x+5)=0(x+5)+(x+4)=0x=-5,-4

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