If a,b,c are in AP, prove that (1) (a-c)²=4(a-b)(b-c) (2) a²+c²+4ac=2(ab+bc+ca)

If a,b,c are in AP, prove that (1) (a-c)²=4(a-b)(b-c) (2) a²+c²+4ac

1.	If a,b,c are in AP, prove that (1) (a-c)²=4(a-b)(b-c) (2) a²+c²+4ac=2(ab+bc+ca)
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