Question

factorise
$42 - x { }^{2} - x$
​

Answer 1

Heya❤

$42 - x {}^{2} - x \\ - x {}^{2} - x + 42 \\ x {}^{2} + x - 42 \\ x {}^{2} + 7x - 6x - 42 \\ x (x + 7) - 6(x + 7) \\ (x + 7)(x - 6)$

Now,

x+7=0

☆x= -7☆

x-6=0

☆x=6☆

Hope it helps you

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