[tex]x = \sqrt{(3 + 9) \times 30 } + (4 - 4) \\ x = \sqrt{12 \times 30} + 0 \\ x = \sqrt{360} \\ x = 6 \sqrt{10} \\ y = 750 \\ ma = \frac{x + y}{2} = \frac{6 \sqrt{10} + 750}{2} = \frac{2(3 \sqrt{10} + 375)}{2} = 3 \sqrt{10} + 375 \\ mg = \sqrt{x \times y} = \sqrt{6 \sqrt{10} \times 750} = \sqrt{4500 \sqrt{10} } = 30 \sqrt{5 \sqrt{10} } [/tex]
