tính A=5/(√7-√5)-(7-√7)/(√7-1)+6√1/2 October 15, 2020 by Orla Orla tính A=5/(√7-√5)-(7-√7)/(√7-1)+6√1/2
`A=5/(√7-√5)-(7-√7)/(√7-1)+6√1/2` `A=(5(√7+√5))/((√7+√5)(√7-√5))-(√7(√7-1))/(√7-1)+6√2/4` `A=(5√7+5√5)/(7-5)-√7+(6√2)/2` `A=(5√7+5√5)/2-(2√7)/2+(6√2)/2` `A=(5√7+5√5-2√7+6√2)/2` `A=(3√7+5√5+6√2)/2` Reply
`A=5/(√7-√5)-(7-√7)/(√7-1)+6√1/2`
`A=(5(√7+√5))/((√7+√5)(√7-√5))-(√7(√7-1))/(√7-1)+6√2/4`
`A=(5√7+5√5)/(7-5)-√7+(6√2)/2`
`A=(5√7+5√5)/2-(2√7)/2+(6√2)/2`
`A=(5√7+5√5-2√7+6√2)/2`
`A=(3√7+5√5+6√2)/2`