= 3*1/2 + 2*(-1) + 3 = 3/2 -2 +3= 1,5 -2 +3 = 2,5
D=1+8=9=3²
x1=(-1+3)/(-2)=-1
x2=(-1-3)/(-2)=2
Через формулу (а-б)(а+б)=а^2-б^2
(5-3√2)(5+3√2)=25-9*2=25-18=7
Y=46sinx-46x+π/4
y`=46cosx-46
46cosx-46=0
46cosx=46
cosx=1
x=2πn
n=0 x=0∈[-π/2;π/2]
y(-π/2)=46sin(-π/2)-46*(-π/2)+π/4=-46+23π+π/4≈27 наиб
y(0)=46sin0-46*0+π/4=π/4≈0,8
y(π/2)=46sinπ/2-46*π/2+π/4=46-23π+π/4≈-25,4 наим