Question

Using identity, Evaluate: 27² – 19².
pls answer fast

Answer 1

Answer:

729-361=368

I hope this answer help you

Answer 2

Identity: a² - b² = (a + b)(a - b)

∴ 27² - 19² = (27 + 19)(27 - 19)

⇒ 27² - 19² = 46 × 8

⇒ 27² - 19² = 368 (answer).