Question

rezolvati urmatoarele ecuatii unde x apartine R

a) 2x²=72
b)2x²=50
c)3x²=27
d)5x²=80​

Answer 1

a) 2x² = 72 | :2

x² = 36

x1= +6, x2 = -6

b) 2x² = 50 | : 2

x² = 25

x1 = -5, x2 = 5

c) 3x² = 27 | : 3

x² = 9

x1 = -3, x2 = 3

d) 5x² = 80 | : 5

x² = 16

x1 = 4, x2 = -4