a) |3-12-5|| = ?
b) |3√7-5√3 = ?
c) |2-√3|+ |2+√3|= ?
d) |√3 - 5|-|√3 - 1| = ?
e) (3-√2)^2 (wszystko jest pod pierwiastkiem) =
f) (2-√7)^2 pod pierw wszystko =
g) |7-√7|/|7-√7| =
h) |2√5-3|-5|√5-2|+5-3√5|=
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a) |3 - 12 - 5| = |- 14| = 14
b) |3√7 - 5√3| = 5√3- 3√7
c) |2 - √3| + |2 + √3|= 2 - √3 + 2 + √3 = 4
d) |√3 - 5| - |√3 - 1| = 5 - √3 - (√3 - 1) = 5 - √3 - √3 + 1 = 6 -2 √3
e) √(3 - √2)² = |3 - √2| = 3 - √2
f) √(2 - √7)² = |2 - √7| = √7 - 2
g) |7 - √7| / |7 - √7| = 1
h) |2√5 - 3| - 5|√5 - 2| + |5 - 3√5| = 2√5 - 3 - 5·(√5 - 2) + 3√5 - 5 = 2√5 - 3 - 5√5 + 10 + 3√5 - 5 = 2