rationalise denominator 6 upon under root 18- under root 45
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Step-by-step explanation:
6 / √18 - √45
= 6 / √18 - √45 × √18 + √45 / √18 + √45
= 6(√18 + √45) / 18 - 45
= 6 (√18 + √45) / -27
= 6 × 3 (√2 + √5) / -27
= -2(√2 + √5) / 3
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