Question

Rezolva in R:a)3x²=162;b)x²=48;c)x²=72;d)x²=0,8;e)x²=1,5.

Answer 1

a) 3x² = 162  x² = 162/3  x² = 54 x = +/ - √54 = +/ -3√6 b) x² = 48 x = +/ - 4√3 c) x² = 72  x = +/- 6√2 d) x² = 8/10 = 4/5  x = +/- 2/√5 = +/- 2√5/5 e) x² = 15/10 = 3/2  x = +/- √3/√2 = +/- √6/2