(a(i))[2]
Simplify this expression. $(3x^2y^4)^3$.
(a(ii))[3]
Simplify this expression. $\left(\frac{16}{x^{16}y^8}\right)^{\frac{3}{2}}$.
(b(i))[1]
Factorise this expression. $x^2 - 9$.
(b(ii))[3]
Simplify this fraction. $\frac{x^2 - 9}{2xy - 6y + 5x - 15}$.
(c)[6]
Solve the simultaneous equations. Show every step of your working and write your answers correct to $2$ decimal places.\n$2x + y = 7$\n$y = 5x^2 + 2x - 13$