Question

plz factorise it and the correct answer will be mArk as brainliest ​

Answer 1

Answer:

( x + 3 ) ( 2 x - 7 )

Step-by-step explanation:

We have to factorize :

2 x² - x - 21

Since ' a . c ' = 21 × 2 = 42

Splitting mid part as :

' 6 - 7 ' which provide us our desire result!

= > 2 x² - 7 x + 6 x - 21

= > 2 x² + 6 x - 7 x - 21

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

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

Hence we get required answer!