Question

(52)square - (48)square solve using identities

Answer 1

${52}^{2} - {48}^{2} = (52 - 48)(52 + 48) \: (using \: {a}^{2} - {b}^{2} = (a - b)(a + b)) \\ = 4 \times 100 = 400$

Answer 2

52^2 - 48^2

= (52 - 48) (52 + 48)

= 4 ×100

= 400.