Question

1 7. Rationalise 3 + √2​

Answer 1

Answer: 7

Steps: (3+√2)(3-√2)  [using $(a+b)(a-b) = a^{2} - b^{2}$ ]

= $3^{2} - (\sqrt{2 } ) ^ {2}$

= 9 - 2

= 7

Rationalising factor = $(3 - \sqrt{2})$

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