Question

Rezolvati ecuatiile:
A) 2•x-10=0
B)3x+8=x+16
C). 2
X - 5x+6=0
Va rog,daca ma poate ajuta cinevaam lucrare

Answer 1

a)  

2 x - 10 = 0

2 x = 10

x = 10 : 2

x = 5

____________________

b)

x² - 5 x + 6 = 0

Δ = 25 - 24 = 1

x = ( 5 + 1 ) / 2 = 6 / 2 = 3

x = ( 5 - 1 ) / 2 = 4 / 2 = 2

3 x + 8 = x + 16

3 x - x = 16 - 8

2 x = 8

x = 8 : 2

x = 4

______________________

c)

x² - 5 x + 6 = 0

Δ = 25 - 24 = 1

x₁ = ( 5 + 1 ) / 2 = 6 / 2 = 3

x₂ = ( 5 - 1 ) / 2 = 4 / 2 = 2