Question

Help please
Express (2-√3)^2 in the form b+c√3 where b and c are intergers

Answer 1

Write this in a form which we can multiply:
\[(2-\sqrt{3})(2-\sqrt{3})\] Foil this out to get:
\[4-4\sqrt{3}+3\] Combine like terms:
\[7-4\sqrt{3}\]

Answer 2

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