Question

please answer for the problem

Answer 1

$if \: a \: b \: c \: are \: in \: gp \: then \\ {b}^{2} = ac \\ {x}^{2} = ( - 4)( - 9) \\ {x}^{2} = 36 \\ x = 6 \: and \: - 6$
so positive value of X is 6





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