.........................................................................................
f(x)=3x^2+5x+3
f ' (x)=6x+5=-7
x=(-7-5)/6=-2
ответ х=-2
.........................................................................................
f(x)=3x^2+5x+3
f ' (x)=6x+5=-7
x=(-7-5)/6=-2
ответ х=-2