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Metamath Proof Explorer

Theorem sq7

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

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

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	$⊢ 7^{2} = 49$