Question

Use identities to evaluate : (502)²

Answer 1

(502)²
(502)² = (500 + 2)²
We know that,
( a + b )² = a² + b² + 2ab
∴ ( 500 + 2 )² = 500² + 2² + 2 x 500 x 2
                        = 250000 + 4 + 2000
                        = 2,52,004