Which of the following is equal to $x$?
$x^{\frac{12}{7}}-x^{\frac{5}{7}}$
$\left(\sqrt{x^{3}}\right)^{\frac{2}{3}}$
$\sqrt[12]{\left(x^{4}\right)^{\frac{1}{3}}}$
$x^{\frac{12}{7}} \times x^{\frac{7}{12}}$
Rationalise the denominator of the following:
$\frac{3 \sqrt{5}+\sqrt{3}}{\sqrt{5}-\sqrt{3}}$
Find the value of $a$ :
$\frac{3-\sqrt{5}}{3+2 \sqrt{5}}=a \sqrt{5}-\frac{19}{11}$
Prove that
$\left(\frac{x^{a}}{x^{b}}\right)^{a+b} \times\left(\frac{x^{b}}{x^{c}}\right)^{b+c} \times\left(\frac{x^{c}}{x^{a}}\right)^{c+a}=1$
State whether each of the following statements is true or false
$\sqrt{49}$ is an irrational number.
Rationalise the denominator in each of the following
$\frac{4}{\sqrt{10}+\sqrt{6}}$