Arif's answer to ajaksjak's Secondary 4 A Maths Singapore question.
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It's good practice to do prime factorisation so its easier to convert to the desired surd. To rationalise, simply just invert the middle sign. For example, if denominator is a + bsqrt(z), change + to - so it becomes a - bsqrt(z). Multiply a - bsqrt(z) on numerator and denominator.
Date Posted:
3 years ago
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