Question

Factorize a^2–b^2 Hence find the exact value of 2557^2-2547^2

Answer 1

Answer:

51,040.

Step-by-step explanation:

a^2–b^2 = (a - b)(a + b) so

2557^2-2547^2 = (2557-2547)2557+2547)

=  10 * 5104

= 51,040.

Answer 2

Answer:51040

Step-by-step explanation:a^2-b^2=(a+b)(a-b)

2557^2-2547^2

(2557-2547)(2557+2547)

(10)(5104)

51040