Question

Using suitable identity evalute
(502) ²-(498) ².

Answer 1

Step-by-step explanation:

we know that

${x}^{2} - {y}^{2} = (x + y)(x - y) \\ here \\ x = 502 \: \: y = 498 \\ = (502 + 498)(502 - 498) \\ = 1000 \times 4 \\ = 4000$

hence required number is 4000