(2x2 + 5x) (2x2 + 5x – 19) + 84
Answer :
(2x2 + 5x) (2x2 + 5x – 19) + 84
Let us assume, 2x2 + 5x = p
So, (p) (p – 19) + 84
p2 – 19p + 84
p2 – 12p – 7p + 84
p(p – 12) – 7(p – 12)
(p – 12) (p – 7)
Now, substitute the value of p we get,
(2x2 + 5x – 12) (2x2 + 5x – 7)