Question

Решите уравнение (3x + 2)(x - 4) = 5

Answer 1

Ответ:

(3х + 2)(х - 4)= 5

3x^2 -12x + 2x -8 = 5

3x^2 - 10x -13 =0

D = 100 + 156= 256 $\sqrt{256} = 16$

$x_{1} = \frac{10-16}{6} = -1$

$x_{2} = \frac{10+16}{6} = 4,3$