Question

Factorise (viii) X (2x – 1) -1

Answer 1

Answer:

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Step-by-step explanation:

$2x ^{2} - x \: - 1 = 2x ^{2} - 2x \: + x \: - 1 = 2x(x - 1) + 1(x - 1) \: = (x - 1)(2x + 1)$

Answer 2

Answer:

(2X+1) (X-1)

Step-by-step explanation:

X(2X-1)-1

2x^2-x-1

splitting the middle term

2x^2-2x+x-1

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

taking common (x-1)

(2x+1)(x-1)

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