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# Simplifying surds and rationalising denominators ( review)

Objectives: to be able to ,

• – Use the rules for multiplying and dividing surds
• – Rationalise the denominator of a fraction
• – Expand and simplify brackets containing surds.

Prior knowledge: you should already know how to,

• – Calculate basic square roots.
• – Simplify fraction ( with denominator and numerator as a whole number).