Rezolvati in multimea numerelor reale urmatoarele ecuatii:
a) (2x+3)² - 2(x-1)(x+1) + 15 = 3(2-x)² - (x+1)² - 11
b) [tex] \frac{ \sqrt{2}x+3 }{3} - \frac{x}{ \sqrt{2} } + \frac{3x}{ \sqrt{18} } = \frac{9- \sqrt{2}x }{6} [/tex]