Question

Factorise:

$2x { }^{2} - x - 1$
$2x { }^{2} + 7x - 4$
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Answer 1

Answer:

$2 {x}^{2} - x - 1 = > 2 {x}^{2} - 2x +x - 1$

$= > 2x(x - 1) + 1(x - 1) = >$

$(2x + 1)(x - 1)$

$2 {x}^{2} + 7x - 4 = > 2 {x}^{2} + 8x - x - 4$

$= > 2x( x + 4) - 1(x + 4) = >$

$(2x - 1)(x + 4)$

Hope it helps you.

Answer 2

Answer:

I hope u understand...