the A.S mean of two no.s : 8,2x^2 exceeds their positive G.M by 9 .Find X

i got it 5, -5 is that right?

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- Jun 24th 2012, 03:16 AMmido22problem with sequence and means
the A.S mean of two no.s : 8,2x^2 exceeds their positive G.M by 9 .Find X

i got it 5, -5 is that right? - Jun 24th 2012, 04:06 AMmido22Re: problem with sequence and means
- Jun 24th 2012, 04:08 AMbiffboyRe: problem with sequence and means
- Jun 24th 2012, 04:13 AMmido22Re: problem with sequence and means
but -5 is also correct

- Jun 24th 2012, 06:32 AMHallsofIvyRe: problem with sequence and means
Yes, mido22, x= 5 and x= -5 are the answers.