Question

8x³ + 4x² - 4x-1=0. solve​

Answer 1

Explanation:

"Group" the polynomial into two parts:

8

x

3

+

4

x

2

−

2

x

−

1

Factor out a common term from either section.

4

x

2

(

2

x

+

1

)

−

1

(

2

x

+

1

)

Notice that a

2

x

+

1

term can be factored out.

(

2

x

+

1

)

(

4

x

2

−

1

)

Notice that

4

x

2

−

1

is a difference of squares.

(

2

x

+

1

)

(

2

x

+

1

)

(

2

x

−

1

)

(

2

x

+

1

)

2

(

2

x

−

1

)