How do you factor 12p2+16p+5?

1 Answer

(6p+5)(2p+1)

Use the quadratic formula for solving ax2+bx+c=0

x=b±b24ac2a

Taking b24ac this is 1624.12.5=256240=16, 16=4

This gives p=16±42.12 thus p=1224or2024

Simplifying gives p=12orp=56

These can be written as 2p+1=0or6p+5=0

Hence 12p2+16p+5=(6p+5)(2p+1)