4
Rationalise the denominator of
4%3-root 7
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____4____ × ___3 + √7__ = 12 + √7 = 12 + √7 = 12 + √7
3 - √7 × 3 + √7 = 3² - √7² = 9 - 7 = 2
= 6 + √7
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