Finally, simplify where you can ... Either the grid method or FOIL can be used to expand double brackets, so choose the one you're most confident with when answering these types of questions.

Expanding brackets uses your skills in simplifying algebra. Remember that \(2 \times a = 2a\), \(a \times a = a^2\) and \(a - 2 = a + (-2)\). Powers or indices are the floating numbers next to ...