Theorem sq7

Description: The square of 7 is 49. (Contributed by SN, 26-Aug-2025)

	Ref	Expression
Assertion	sq7	$$⊢7^2=49$$

Proof

Step	Hyp	Ref	Expression
1		7cn	$$⊢7\in ℂ$$
2	1	sqvali	$$⊢7^2=7\cdot 7$$
3		7t7e49	$$⊢7\cdot 7=49$$
4	2 3	eqtri	$$⊢7^2=49$$