Question

Toate cele 4 va rog
Urgent ‼️‼️‼️‼️‼️

Answer 1

Răspuns:

Explicație pas cu pas:

1.

a) x = 0

b) Nu are solutii in R

c) x = +2    x = -2

d) x = +3    x = -3

e) x = +4    x = -4

f) x = +5    x = -5

g) x = +6    x = -6

h) x = +7    x = -7

2.

a) x = +4/5    x = -4/5

b) x = +5/6    x = -5/6

c) x = +7/4    x = -7/4

d) x = +8/9    x = -8/9

3.

a) 2x² = 72

x² = 36

x = +6    x = -6

b) 2x² = 50

x² = 25

x = +5    x = -5

c) 3x² = 27

x² = 9

x = +3    x = -3

d) 5x² = 80

x² = 16

x = +4   x = -4

4.

a) 2x² = 25/2

x² = 25/4

x = +5/2    x = -5/2

b) 3x² = 64/3

x² = 64/9

x = +/3    x = -8/3

c) 5x² = 36/5

x² = 36/25

x = +6/5    x = -6/5

d) 7x² = 64/7

x² = 64/49

x = +8/7    x = -8/7