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12 cards from this deck
Bad presentation
Form with rational denominator
Multiply by aa\frac{\sqrt{a}}{\sqrt{a}}aa
Simplify surds first
353\sqrt{5}35
252\sqrt{5}25
a−bca - b\sqrt{c}a−bc
Multiply by conjugate over itself
To rationalise a+bca+b\sqrt{c}a+bc denominators
No, bad in examiner's eyes
777
655\frac{6\sqrt{5}}{5}565
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