Question

2x²-x-1 reslove the following into factor​

Answer 1

Answer:

(2x+1)(x-1)

Explanation:-

=2x²-2x+x-1

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

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

Answer 2

Answer:

2x²-x-1

2x² -2x +x -1

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

(x-1) (2x+1)

x-1=0 2x+1=0

x=1 x=-1/2

Factors ar 1 and -1/2

Substitute the value of x which is 1

2(1)²-1-1=0

2-2=0

0=0

Substitute the value of x which is -1/2

2(-1/2)²-(-1/2) -1=0

-1/2 +1/2-1=0

-1/2+1/2-2/2=0

-1+1-2/2=0

-1=0

This indicates that 1 is the factor of the given equation