Question

sa se rezolve ecuatiile 2(3x-5)=4x+20
2x la puterea2 -5x+2=0​

Answer 1

Răspuns:

1.6x-10=4x+20

2x=10

x=10

2. calculăm delta

$= 5 ^{2} - 4 \times 2 \times 2 = 25 - 16 = 9$

$x1 = \frac{5 + 3}{4} = 2$

$x2 = \frac{5 - 3}{2} = 1$