**(2x**^{2} + 5x) (2x^{2} + 5x – 19) + 84

^{2}+ 5x) (2x

^{2}+ 5x – 19) + 84

**Answer :**

(2x^{2} + 5x) (2x^{2} + 5x – 19) + 84

Let us assume, 2x^{2} + 5x = p

So, (p) (p – 19) + 84

p^{2} – 19p + 84

p^{2} – 12p – 7p + 84

p(p – 12) – 7(p – 12)

(p – 12) (p – 7)

Now, substitute the value of p we get,

(2x^{2} + 5x – 12) (2x^{2} + 5x – 7)

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