Question

Using the identity (x+a)(x-a) = x²-a²,find 5²-4²

Answer 1

Answer:

→5²-4²

→(5+4)(5-4)

→(9)(1)

→9×1

→9

Answer 2

Step-by-step explanation:

As x2−a2=(x+a)(x−a)

Here  x=6,a=5

⇒62−52=(6+5)(6−5)=11×1=11