Question

Factorise :
$7 \sqrt{2x {}^{2} } - 10x - 4 \sqrt{2}$
​

Answer 1

Answer:

72x2−10x−42

72×42=56=14×64

(14−4)=10

so, we split 10 as (14-4)

⇒72x2−(14−4)x−42

⇒72x2−14x+4x−42

⇒72x[x−2]+4[x−2]

⇒[72x+4][x−2]