Question

solve (2+√3) (2-√3) step by step solve ​

Answer 1

Step-by-step explanation:

Using the rule: (a+b) (a-b) = a^2 - b^2

Our equation: (2+sqrt3) (2-sqrt3) = 2^2 - sqrt3^2

= 4 - 3 = 1

Notes:

1.1 The definition of square root:

sqrt(n) * sqrt(n) = n.

This is by the definition of square root:

…. If r = sqrt(n)

…. then r X r = n.

1.2 Any n which is a result of squaring - is necessarily a positive number.

Answer 2

Answer:

$1$

Step-by-step explanation:

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

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

= (4-3)

= 1

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