Question

find the product by using a suitable identity
a) (p-5) (p-4)

by using identity (x+a) (x+b) =x square +(a+bi) x +ab


Algebraic Identity​

Answer 1

(p-5)(p-4)=(p)^2+((-5)+(-4))p+(-5)(-4)=p^2-9p+20.

Hope it helps.