Toán Lớp 9: Giúp với !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
$\sqrt[]{9x+18}$ $+$ $5\sqrt{x+2}$ $-$ $\frac{4}{5}$ $\sqrt{25x+50}$ $=$ $8$ $\\$
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Toán Lớp 9: Giúp với !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
$\sqrt[]{9x+18}$ $+$ $5\sqrt{x+2}$ $-$ $\frac{4}{5}$ $\sqrt{25x+50}$ $=$ $8$ $\\$
Comments ( 2 )
$⇔\sqrt[]{(9x+2)}$ $+$ $5\sqrt{x+2}$ $-$ $\frac{4}{5}$ $\sqrt{25(x+2)}$ $=$ $8$
$⇔3\sqrt{x+2}$ $+$ $5\sqrt{x+2}$ $-$ $\frac{4}{5}$ $.5\sqrt{x+2}$ $=$ $8$
$⇔3\sqrt{x+2}$ $+$ $5\sqrt{x+2}$ $-$ $4\sqrt{x+2}$ $=$ $8$
$⇔4\sqrt{x+2}$ $=$ $8$
$⇔\sqrt{x+2}$ $=$ $2$
$⇔x+2$ $=$ $4$
$⇔x+$ $=$ $2$