Question

Factorise : x²+9x+18 = (x+6)(........)

Answer 1

$\sf x^2 + 9x + 18$

$\sf = x^2 + 6x + 3x + 18$

$\sf = x ( x + 6 ) + 3 ( x + 6 )$

$\sf = ( x + 3 ) ( x + 6 )$

Answer 2

Answer:

x^2 + 9x + 18 = x^2 +6x + 3x + 18

= x(x-6) + 3(x-6) = (x+6) (x-3)

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