Question

Factorise
$84 - 2r - 2 {r}^{2}$
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Answer 1

Answer:

$2(42 - r - {r}^{2} )$

$= > 2( {r}^{2} + r - 42)$

$= > 2( {r}^{2} + 7r - 6r - 42)$

$= > 2(r(r + 7) - 6(r + 7))$

$= > 2(x + 7)(r - 6)$

$= > 2(r + 7)(6 - r)$

Answer 2

The answer of your question is 2(r+7)(6-r). It can also be written as -2(r+7)(r-6).