Question

what is the suitable Identity to solve 49 × 51​

Answer 1

Answer:

(50-1)(50+1)

Step-by-step explanation:

(a+b)(a-b)

Answer 2

Answer:

$49 \times 51 \\ (50 - 1)(50 + 1) \\ {50}^{2} - 1 \\ 2500 - 1 \\ 2499$