What is factor 21x^2-4x-1 ?

The solution to factor 21x^2-4x-1 is (7x+1)(3x-1)

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factor 21x^2-4x-1

factor

21 x^{2} - 4 x - 1

(7 x + 1) (3 x - 1)

Solution steps

21 x^{2} - 4 x - 1

Break the expression into groups

= (21 x^{2} + 3 x) + (- 7 x - 1)

Factor out

3 x

from

21 x^{2} + 3 x : 3 x (7 x + 1)

Factor out

- 1

from

- 7 x - 1 : - (7 x + 1)

= 3 x (7 x + 1) - (7 x + 1)

Factor out common term

(7 x + 1) : (7 x + 1) (3 x - 1)

= (7 x + 1) (3 x - 1)

∣ X ∣ \geq 5

- 12 - 4 n = 20

(x + 8 i) (x - 8 i)

lo g_{6} (216)

\frac{1}{2} a + \frac{1}{3} b + 2 a - 3 b - \frac{3}{4} a - \frac{1}{6} b + \frac{3}{4}