Question

СРОЧНООООООООООООРР​

Answer 1

$2)\; \; y=(x+2)^2-3\\\\3)\; \; f(x)=-x^2+7x-3\\\\f(2)=-4+14-3=7\\\\4)\; \; y=3x^2-12x+1\\\\x(versh)=-\frac{b}{2a}=-\frac{-12}{6}=2\\\\y(versh)=y(2)=3\cdot 4-12\cdot 2+1=-11\; \; \; \Rightarrow \; \; \; V(2,-11)$

$5)\; \; f(x)=-x^2+6x+2\\\\OOF:\; \; x\in (-\infty ,+\infty )\\\\x(versh)=-\frac{6}{-2}=3\; ,\; \; y(versh)=-9+18+2=11\\\\MZF:\; \; y\in (-\infty ,11\; ]$

$6)\; \; y=x^2-6x+5\\\\x(versh)=3\; ,\; y(versh)=-4\\\\x=0\; \; \to \; \; y=5\\\\y=0\; \; \to \; \; x_1=1\; ,\; x_2=5$