Theorem resqcli

Description: Closure of square in reals. (Contributed by NM, 2-Aug-1999)

	Ref	Expression
Hypothesis	resqcl.1	$$⊢A\in ℝ$$
Assertion	resqcli	$$⊢A^2\in ℝ$$

Proof

Step	Hyp	Ref	Expression
1		resqcl.1	$$⊢A\in ℝ$$
2		resqcl	$$⊢A\in ℝ\to A^2\in ℝ$$
3	1 2	ax-mp	$$⊢A^2\in ℝ$$