Theorem sq4

Description: The square of 4 is 16. (Contributed by SN, 26-Aug-2025)

	Ref	Expression
Assertion	sq4	|- ( 4 ^ 2 ) = ; 1 6

Proof

Step	Hyp	Ref	Expression
1		4cn	|- 4 e. CC
2	1	sqvali	|- ( 4 ^ 2 ) = ( 4 x. 4 )
3		4t4e16	|- ( 4 x. 4 ) = ; 1 6
4	2 3	eqtri	|- ( 4 ^ 2 ) = ; 1 6