Question

64^х-8^х-56=0 решить

Answer 1

$64^{x} -8^{x}-56=0\\\\(8^{x})^{2}-8^{x}-56=0\\\\8^{x}=m,m>0\\\\m^{2}-m-56=0\\\\m_{1}=8\\\\m_{2}=-7<0-neyd\\\\8^{x} =8\\\\x=1\\\\Otvet:1$