Question

factorise 36z²-49x²​

Answer 1

Answer:

(6z+7x) × (6z-7x)

36z^2 = (6z)^2

49x^2 = (7x)^2

By using the identity,

(6z)^2 - (7x)^2 = (6z+7x) × (6z-7x)