Factorise:

Question:

Factorise:

$6-x-x^{2}$

Solution:

$-x^{2}-x+6$

$=-x^{2}-3 x+2 x+6$

$=-x(x+3)+2(x+3)$

$=(x+3)(-x+2)$

$=(x+3)(2-x)$

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