Question

$factorise \: 42 - x - {x}^{2}$
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Answer 1

Answer:

x^2 -x-42.

x^2 -7x+6x-42 ( by middle term splitting).

x(x-7)+ 6(x-7)

(x+6) (x-7).

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Answer 2

$\huge\underline\mathfrak\green{Answer}$

${x}^{2} - x - 42$

${x}^{2} - [ 7x - 6x ] - 42$

${x}^{2} - 7x + 6x - 42$

$x ( x - 7 ) + 6 ( x - 7 )$

(x - 7 )(x + 6 )

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