Which among the below option can be a square root of ? $(x^2 - 14x + 49)(x^2 + 6x + 9)$

(x + 4)(x + 9) (x - 1)(x + 17) (x - 7)(x + 3) (x - 3)(x + 8)

(x - 7)(x + 3)

( a + b )2 = a2 + b2 + 2ab Given, $(x^2 - 14x + 49)(x^2 + 6x + 9)$ = $(x^2 - 14x + 49)$ = (x - 7)2 = $(x^2 + 6x + 9)$ = (x + 3)2 So, = \(\sqrt {(x - 7)^2 (x + 3)^2}\) $(x^2 - 14x + 49)(x^2 + 6x + 9)$ can be the square root of = (x - 7)(x + 3)