What is factor 21x^2-40x-21 ?

The solution to factor 21x^2-40x-21 is (7x+3)(3x-7)

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

factor 21x^2-40x-21

factor

21 x^{2} - 40 x - 21

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

Solution steps

21 x^{2} - 40 x - 21

Break the expression into groups

= (21 x^{2} + 9 x) + (- 49 x - 21)

Factor out

3 x

from

21 x^{2} + 9 x : 3 x (7 x + 3)

Factor out

- 7

from

- 49 x - 21 : - 7 (7 x + 3)

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

Factor out common term

7 x + 3

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

x^{2} + x

13 r + 4 r = 34

\frac{1}{2} (2)^{2} (\frac{3 π}{4})

m - 18 \leq 36

9 (1 + x) - 8 (x + 2) = 2 x

What is factor 21x^2-40x-21 ?
The solution to factor 21x^2-40x-21 is (7x+3)(3x-7)