Решите уравнение 2)4)6)8)9

Question

Решите уравнение 2)4)6)8)9

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Answer 1

2.
x² = 1,96
x1 = +√1,96 = 1,4;
x2 = -√1,96 = 1,4;

4.
x² = 37
x1 = +√37;
x2 = -√37;

6.
3x² = 48 | : 3
x² = 16
x1 = +√16 = +4;
x2 = -√16 = -4;

8.
3,24 - x² = 0
-x² = -3,24 | : (-1)
x² = 3,24
x1 = +√3,24 = +1,8; 
x2 = -√3,24 = -1,8;

9.
2y² - 2,42 = 0
2y² = 2,42 | : 2
y² = 1,21
y1 = +√1,21 = +1,1;
y2 = -√1,21 = -1,1;