Question

rezolvati ecuatiile :
a)0,2x-0,8=0
b)(1- radical din 2) ori x =radical din 2 -2

Answer 1

0,2x=0,8+0
0,2×=0,8
x=4

Answer 2

0.2x-0.8=0⇒0.2x=0.8⇒x=0.8/0.2⇒x=4
(1-√2)×x=√2-2⇒1-√2x=√2-2⇒-√2x=√2-2-1⇒-√2x=√2-3⇒x=√2-3/√2=⇒x=-3
sucees