Verified answer

Ответ:

-4.7(х-14)(х+6.8)=0

х+6.8=0     х-14=0

х=-6.8        х=14

Объяснение:   или другое решение

-4.7(х²-7.2х-95.2)=0

х²-7.2х-95.2=0

Д=51.84+380.8=432.64  √Д=20.8

х1=(7.2-20.8)/2=-6.8

х2=(7.2+20.8)/2=14

Ответ:

[tex] - 4.7(x - 14)(x + 6.8) = 0 \\ - 4.7(x { }^{2} + 6.8x - 14x - 95.2) = 0 \\ - 4.7x {}^{2} - 31.96x + 65.8x + 447.44 = 0 \\ - 4.7 {x}^{2} + 33.84x + 447.44 = 0 \\ d = 1 145,1456 + 4 \times 4.7 \times 447.44 = 9 557,0176 \\ x1 = \frac{ - 33.84 + 97.76}{ - 9.4} = - 6.8 \\ x2 = \frac{ - 33.84 - 97.76}{9.4} = 14[/tex]