Question

решить уравнение:
3x^2-7x-6=0

Answer 1

$3x^{2} - 7x - 6 = 0\D = b^{2} - 4ac = 49 + 72 = 121 = 11^{2}\\x_{1} = frac{-b+sqrt{D}}{2a} = frac{7+11}{6} = frac{18}{6} = 3\\x_{2} = frac{-b-sqrt{D}}{2a} = frac{7-11}{6} = frac{-4}{6} = -frac{2}{3}$

Ответ: $3; -frac{2}{3}$

Answer 2

Спасибо)

Answer 3

$3 {x}^{2} - 7x - 6 = 0 \ 3 {x}^{2} + 2x - 9x - 6 = 0 \ x(3x + 2) - 3(3x + 2) = 0 \( 3x + 2)(x - 3) = 0 \ 3x + 2 = 0 \ x - 3 = 0 \ x 1= - frac{2}{3} \ x2 = 3$

Answer 4

Спасибооо 1grom9