Question

Aflati numarul A.
A=(2- rad3 ) + 1: (2-rad3)

Answer 1

(2- rad3 ) + (2+rad3) : (2-rad3) x (2+rad3)
(2-rad3) + (2+rad3) : (4-3)
(2-rad3) + (2+rad3) :1
2-rad3 + 2 + rad3

se reduc rad3 si este egal cu 4

Answer 2

$2- \sqrt{3}+ \frac{1}{2- \sqrt{3} } = \\ \\ \frac{(2- \sqrt{3})^{2}+1 }{2- \sqrt{3} } = \\ \\ \frac{4-4 \sqrt{3}++3+1}{2- \sqrt{3} } = \\ \\ \frac{8-4 \sqrt{3}}{2- \sqrt{3}} = \\ \\ \frac{4(2- \sqrt{3} }{(2- \sqrt{3}) } = \\ \\ =4$