Rationalising a two term denominator | Maths | Quizalize & Oak National Academy

Starter quiz

Expand the following expression: $(3\sqrt {2} + \sqrt {3})(3\sqrt {2} - \sqrt {3})$
- '15' ✓
Expand the following expression: $(\sqrt {6} + 1)(\sqrt {6} - 1)$
- '5' ✓
Expand the following expression: $(2\sqrt {5} - 3\sqrt {3})(2\sqrt {5} + 3\sqrt {3})$
- '-7' ✓
Expand the following expression: $(5\sqrt {7} - 4\sqrt {2})(5\sqrt {7} + 4\sqrt {2})$
- '143' ✓
Expand the following expression: $(\sqrt {8} + \sqrt {2})(\sqrt {2} - \sqrt {8})$
- '-6' ✓
Expand the following expression: $(\sqrt {10} + 2\sqrt {5})(2\sqrt {5} - \sqrt {10})$
- '10' ✓