Solve frac{sqrt{4}-sqrt{3}}{sqrt{7}+sqrt{3}}+frac{sqrt{4}+sqrt{3}}{sqrt{7}-sqrt{3}}

$$\frac { \sqrt { 4 } - \sqrt { 3 } } { \sqrt { 7 } + \sqrt { 3 } } + \frac { \sqrt { 4 } + \sqrt { 3 } } { \sqrt { 7 } - \sqrt { 3 } }$$

Evaluate

$$\sqrt{7}+\frac{3}{2}\approx 4.145751311$$

Short Solution Steps

Calculate the square root of 4 and get 2.

$$\frac{2-\sqrt{3}}{\sqrt{7}+\sqrt{3}}+\frac{\sqrt{4}+\sqrt{3}}{\sqrt{7}-\sqrt{3}}$$

Rationalize the denominator of \frac{2-\sqrt{3}}{\sqrt{7}+\sqrt{3}} by multiplying numerator and denominator by \sqrt{7}-\sqrt{3}.

$$\frac{\left(2-\sqrt{3}\right)\left(\sqrt{7}-\sqrt{3}\right)}{\left(\sqrt{7}+\sqrt{3}\right)\left(\sqrt{7}-\sqrt{3}\right)}+\frac{\sqrt{4}+\sqrt{3}}{\sqrt{7}-\sqrt{3}}$$

Consider \left(\sqrt{7}+\sqrt{3}\right)\left(\sqrt{7}-\sqrt{3}\right). Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.

$$\frac{\left(2-\sqrt{3}\right)\left(\sqrt{7}-\sqrt{3}\right)}{\left(\sqrt{7}\right)^{2}-\left(\sqrt{3}\right)^{2}}+\frac{\sqrt{4}+\sqrt{3}}{\sqrt{7}-\sqrt{3}}$$

Square \sqrt{7}. Square \sqrt{3}.

$$\frac{\left(2-\sqrt{3}\right)\left(\sqrt{7}-\sqrt{3}\right)}{7-3}+\frac{\sqrt{4}+\sqrt{3}}{\sqrt{7}-\sqrt{3}}$$

Subtract 3 from 7 to get 4.

$$\frac{\left(2-\sqrt{3}\right)\left(\sqrt{7}-\sqrt{3}\right)}{4}+\frac{\sqrt{4}+\sqrt{3}}{\sqrt{7}-\sqrt{3}}$$

Calculate the square root of 4 and get 2.

$$\frac{\left(2-\sqrt{3}\right)\left(\sqrt{7}-\sqrt{3}\right)}{4}+\frac{2+\sqrt{3}}{\sqrt{7}-\sqrt{3}}$$

Rationalize the denominator of \frac{2+\sqrt{3}}{\sqrt{7}-\sqrt{3}} by multiplying numerator and denominator by \sqrt{7}+\sqrt{3}.

$$\frac{\left(2-\sqrt{3}\right)\left(\sqrt{7}-\sqrt{3}\right)}{4}+\frac{\left(2+\sqrt{3}\right)\left(\sqrt{7}+\sqrt{3}\right)}{\left(\sqrt{7}-\sqrt{3}\right)\left(\sqrt{7}+\sqrt{3}\right)}$$

Consider \left(\sqrt{7}-\sqrt{3}\right)\left(\sqrt{7}+\sqrt{3}\right). Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.

$$\frac{\left(2-\sqrt{3}\right)\left(\sqrt{7}-\sqrt{3}\right)}{4}+\frac{\left(2+\sqrt{3}\right)\left(\sqrt{7}+\sqrt{3}\right)}{\left(\sqrt{7}\right)^{2}-\left(\sqrt{3}\right)^{2}}$$

Square \sqrt{7}. Square \sqrt{3}.

$$\frac{\left(2-\sqrt{3}\right)\left(\sqrt{7}-\sqrt{3}\right)}{4}+\frac{\left(2+\sqrt{3}\right)\left(\sqrt{7}+\sqrt{3}\right)}{7-3}$$

Subtract 3 from 7 to get 4.

$$\frac{\left(2-\sqrt{3}\right)\left(\sqrt{7}-\sqrt{3}\right)}{4}+\frac{\left(2+\sqrt{3}\right)\left(\sqrt{7}+\sqrt{3}\right)}{4}$$

Since \frac{\left(2-\sqrt{3}\right)\left(\sqrt{7}-\sqrt{3}\right)}{4} and \frac{\left(2+\sqrt{3}\right)\left(\sqrt{7}+\sqrt{3}\right)}{4} have the same denominator, add them by adding their numerators.

$$\frac{\left(2-\sqrt{3}\right)\left(\sqrt{7}-\sqrt{3}\right)+\left(2+\sqrt{3}\right)\left(\sqrt{7}+\sqrt{3}\right)}{4}$$

Do the multiplications in \left(2-\sqrt{3}\right)\left(\sqrt{7}-\sqrt{3}\right)+\left(2+\sqrt{3}\right)\left(\sqrt{7}+\sqrt{3}\right).

$$\frac{2\sqrt{7}-2\sqrt{3}-\sqrt{21}+3+2\sqrt{7}+2\sqrt{3}+\sqrt{21}+3}{4}$$

Do the calculations in 2\sqrt{7}-2\sqrt{3}-\sqrt{21}+3+2\sqrt{7}+2\sqrt{3}+\sqrt{21}+3.

$$\frac{4\sqrt{7}+6}{4}$$