Solve (sqrt{48}-3sqrt{27})divsqrt{6}

$$( \sqrt { 48 } - 3 \sqrt { 27 } ) \div \sqrt { 6 }$$

Evaluate

$$-\frac{5\sqrt{2}}{2}\approx -3.535533906$$

Solution Steps

Factor 48=4^{2}\times 3. Rewrite the square root of the product \sqrt{4^{2}\times 3} as the product of square roots \sqrt{4^{2}}\sqrt{3}. Take the square root of 4^{2}.

$$\frac{4\sqrt{3}-3\sqrt{27}}{\sqrt{6}}$$

Factor 27=3^{2}\times 3. Rewrite the square root of the product \sqrt{3^{2}\times 3} as the product of square roots \sqrt{3^{2}}\sqrt{3}. Take the square root of 3^{2}.

$$\frac{4\sqrt{3}-3\times 3\sqrt{3}}{\sqrt{6}}$$

Multiply -3 and 3 to get -9.

$$\frac{4\sqrt{3}-9\sqrt{3}}{\sqrt{6}}$$

Combine 4\sqrt{3} and -9\sqrt{3} to get -5\sqrt{3}.

$$\frac{-5\sqrt{3}}{\sqrt{6}}$$

Rationalize the denominator of \frac{-5\sqrt{3}}{\sqrt{6}} by multiplying numerator and denominator by \sqrt{6}.

$$\frac{-5\sqrt{3}\sqrt{6}}{\left(\sqrt{6}\right)^{2}}$$

The square of \sqrt{6} is 6.

$$\frac{-5\sqrt{3}\sqrt{6}}{6}$$

Factor 6=3\times 2. Rewrite the square root of the product \sqrt{3\times 2} as the product of square roots \sqrt{3}\sqrt{2}.

$$\frac{-5\sqrt{3}\sqrt{3}\sqrt{2}}{6}$$

Multiply \sqrt{3} and \sqrt{3} to get 3.

$$\frac{-5\times 3\sqrt{2}}{6}$$

Multiply -5 and 3 to get -15.

$$\frac{-15\sqrt{2}}{6}$$

Divide -15\sqrt{2} by 6 to get -\frac{5}{2}\sqrt{2}.

$$-\frac{5}{2}\sqrt{2}$$