1.

Rationalise 4+ root 3 upon 4- root 3 + 4- root 3 upon 4+root 3

Answer»

USING

(a + b)(a - b) = {a}^{2} - {b}^{2}

so,

=(4 + \sqrt{3})(4 - \sqrt{3)}

= {4}^{2} - ( \sqrt{3)^{2} }

= 16-3

= 13


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