giúp mình với

Bài 5: a) \(5x^2 - 50 = 0\) \(5x^2 = 50\) \(x^2 = 10\) \(x = \sqrt{10}\) hoặc \(x = -\sqrt{10}\) b) \(2\sqrt{x + 3} = 8\) \(\sqrt{x + 3} = 4\) \(x + 3 = 16\) \(x = 13\) c) \(\sqrt{4 - 3x} = \sqrt{5}\) \(4 - 3x = 5\) \(-3x = 1\) \(x = -\frac{1}{3}\) d) \(x^3 + 729 = 0\) \(x^3 = -729\) \(x = -9\) e) \(\sqrt[3]{x - 1} = 2\) \(x - 1 = 8\) \(x = 9\) f) \(\sqrt[3]{2x} - 5 = 0\) \(\sqrt[3]{2x} = 5\) \(2x = 125\) \(x = \frac{125}{2}\) Đáp số: a) \(x = \sqrt{10}\) hoặc \(x = -\sqrt{10}\) b) \(x = 13\) c) \(x = -\frac{1}{3}\) d) \(x = -9\) e) \(x = 9\) f) \(x = \frac{125}{2}\)