Toán Lớp 9: căn 3x^2-căn 867x=0
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Toán Lớp 9: căn 3x^2-căn 867x=0
help đag cần gấp ạ
Comments ( 2 )
$⇔\sqrt{3x^2}-\sqrt{17^2.3x}=0$
$⇔\sqrt{3x^2}-17\sqrt{3x}=0$
$⇔\sqrt{3x}(\sqrt{x}-17)=0$
$⇔\left[ \begin{array}{l}x=0(t/m)\\x=17^2(t/m)\end{array} \right.$