## anonymous 5 years ago √2x + 7 = √5x -8

1. anonymous

$\sqrt{2x} - \sqrt{5x} = -15$ $2x - 2\sqrt{10x^{2}} + 5x = -15$ $7x - 2\sqrt{10}x = -15$ $x(7 - 2\sqrt{10}) = -15$ $x = -15/(7 - 2\sqrt{10})$

2. anonymous

**Correction: That negative 15 should have been squared too. So it's 225 over (7 - 2sqrt(10).

3. anonymous

hmm

4. anonymous

x=5

5. anonymous

try to substitute