WE KNOW THAT

2<3

Multiplying 2 from both sides

2^2 < 3×2
Subtracting 3^2 from both sides

2^2 - 3^2 < 3×2 -3^2

(2-3) (2+3) < 3(2-3) using a^2 -b^2 & taking 3 common

Canceling 2-3 from both sides
2+3< 3

5<3