Solve frac{6sqrt{12}+2sqrt{30}+15sqrt{18}+5sqrt{45}}{9sqrt{36}-sqrt{225}}

$$\frac { 6 \sqrt { 12 } + 2 \sqrt { 30 } + 15 \sqrt { 18 } + 5 \sqrt { 45 } } { 9 \sqrt { 36 } - \sqrt { 225 } }$$

Evaluate

$$\frac{2\sqrt{30}}{39}+\frac{4\sqrt{3}}{13}+\frac{5\sqrt{5}}{13}+\frac{15\sqrt{2}}{13}\approx 3.305633098$$

Solution Steps

Factor 12=2^{2}\times 3. Rewrite the square root of the product \sqrt{2^{2}\times 3} as the product of square roots \sqrt{2^{2}}\sqrt{3}. Take the square root of 2^{2}.

$$\frac{6\times 2\sqrt{3}+2\sqrt{30}+15\sqrt{18}+5\sqrt{45}}{9\sqrt{36}-\sqrt{225}}$$

Multiply 6 and 2 to get 12.

$$\frac{12\sqrt{3}+2\sqrt{30}+15\sqrt{18}+5\sqrt{45}}{9\sqrt{36}-\sqrt{225}}$$

Factor 18=3^{2}\times 2. Rewrite the square root of the product \sqrt{3^{2}\times 2} as the product of square roots \sqrt{3^{2}}\sqrt{2}. Take the square root of 3^{2}.

$$\frac{12\sqrt{3}+2\sqrt{30}+15\times 3\sqrt{2}+5\sqrt{45}}{9\sqrt{36}-\sqrt{225}}$$

Multiply 15 and 3 to get 45.

$$\frac{12\sqrt{3}+2\sqrt{30}+45\sqrt{2}+5\sqrt{45}}{9\sqrt{36}-\sqrt{225}}$$

Factor 45=3^{2}\times 5. Rewrite the square root of the product \sqrt{3^{2}\times 5} as the product of square roots \sqrt{3^{2}}\sqrt{5}. Take the square root of 3^{2}.

$$\frac{12\sqrt{3}+2\sqrt{30}+45\sqrt{2}+5\times 3\sqrt{5}}{9\sqrt{36}-\sqrt{225}}$$

Multiply 5 and 3 to get 15.

$$\frac{12\sqrt{3}+2\sqrt{30}+45\sqrt{2}+15\sqrt{5}}{9\sqrt{36}-\sqrt{225}}$$

Calculate the square root of 36 and get 6.

$$\frac{12\sqrt{3}+2\sqrt{30}+45\sqrt{2}+15\sqrt{5}}{9\times 6-\sqrt{225}}$$

Multiply 9 and 6 to get 54.

$$\frac{12\sqrt{3}+2\sqrt{30}+45\sqrt{2}+15\sqrt{5}}{54-\sqrt{225}}$$

Calculate the square root of 225 and get 15.

$$\frac{12\sqrt{3}+2\sqrt{30}+45\sqrt{2}+15\sqrt{5}}{54-15}$$

Subtract 15 from 54 to get 39.

$$\frac{12\sqrt{3}+2\sqrt{30}+45\sqrt{2}+15\sqrt{5}}{39}$$