Factorise: $2 x^{2} - x - 21$

Open in App

Solution

The given expression $2 x^{2} - x - 21$ can be factorised as follows:

$2 x^{2} - x - 21 = 2 x^{2} - 7 x + 6 x - 21$

$= x (2 x - 7) + 3 (2 x - 7)$

$= (x + 3) (2 x - 7)$

Hence, $2 x^{2} - x - 21 = (x + 3) (2 x - 7)$

Suggest Corrections

Similar questions

2 x^{2} + 11 x - 21

2 x^{2} + 11 x - 21

2 x^{2} - x - 3

- 2 x^{2} + 3 x + 9

Factorise:

$2 x^{2} + x - 45$

Factorise 2x²-x-6

Join BYJU'S Learning Program