Question

Factorise : x^2 + 9x +18

Answer 1

Answer:

= x^2+(9+2)x+18

=x^2+9x+2x+18(grouping)

=(x^2+9x)+(2x+18)

=X(X+9)+2(X+9)

=(X+9) (X+2)

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Answer 2

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x^2 + 9x + 18=0

x^2 +6x+3x + 18=0

x(x+6) + 3(x+6)=0

(x+6) (x+3)=0

x = -6 & x = -3