Question

3 (5×-6)(3×+2)-6 (3×+9)(×-1)-3 (9×+1)(×-2)=0

Answer 1

Respuesta:

$3(5x - 6)(3x + 2) - 6(3x + 9)(x - 1) - 3(9x + 1)(x - 2) = 0 \\ (15x - 18) \times (3x + 2) + ( - 18 x - 54) \times (x - 1) + ( - 27x - 3) \times (x - 2) = 0 \\ 45 {x}^{2} + 30x - 54x - 36 - 18 {x}^{2} + 18x - 54x + 54 - 27 {x}^{2} + 54x - 3x + 6= 0 \\ 0 {x}^{2} - 9x + 24 = 0 \\ - 9x + 24 = 0 \\ - 9x = - 24 \\ x = - 24 \div (- 9) \\ x = \frac{8}{3}$