Question

2x²–x–1 factorise???????​

Answer 1

2x²-x-1

2x²-2x+x-1

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

(2x+1)(x-1)

x=-1/2 ,,x=1

Answer 2

Step-by-step explanation:

2x

2

−x−1

x

2

−

2

x

−

2

1

=x

2

−x+

2

x

−

2

1

=x(x−1)+

2

1

(x−1)

=(x−1)(x+

2

1

)