Question

using identities (a+b)(a-b)=a^2-b^2


25.3×14.7

Answer 1

(20+5.3)(20-5.3)
=20^2-5.3^2
=400-28.09
=371.91

Answer 2

$\huge\bold\green{Solution :}$

$\mathsf{\tiny{ = (20 + 5.3)(20 - 5.3)}}$
$\mathsf{\tiny{ = {20}^{2} - {5.3}^{2}}} \\ \mathsf{\tiny{ = 400 - 28.09}}$
$\mathsf{\tiny{= 371.91}}$