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