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Metamath Proof Explorer

Theorem sq3

Description: The square of 3 is 9. (Contributed by NM, 26-Apr-2006)

		Ref	Expression
	Assertion	sq3	$⊢ 3^{2} = 9$

Step	Hyp	Ref	Expression
1		3cn	$⊢ 3 \in ℂ$
2	1	sqvali	$⊢ 3^{2} = 3 \cdot 3$
3		3t3e9	$⊢ 3 \cdot 3 = 9$
4	2 3	eqtri	$⊢ 3^{2} = 9$